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Lets-Plot Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[4.3.2] - 2024-04-25

Changed

  • to_svg(), to_html(): return the content as string if no "path" is given [#1067].

Fixed

  • LP occasionally crashes when drawing polygons [#1084].
  • Regression of issue [#966].
  • Livemap: labels on the map look blurry [#1045].
  • Linetype doesn't work for geom_tile() [LPK-241].

[4.3.1] - 2024-04-16

Added

Fixed

  • ggmarginal(): broken coloring [#760].
  • Incorrect 'plot_background' area (with empty space capture) [#918].
  • geom_density2df: uneven borders [#941].
  • DateTime is not recognised in polars.DataFrame [#961].
  • Support geom_spoke() in geom_livemap() [#988].
  • NASA BlueMarble tiles have become blank [#1000].
  • Line segments in geom_density2df() do not get interpolated when used with coord_polar() [#1037].
  • arrow on segment: reduce arrow size for short segments [#1040].
  • arrow on curve sometimes looks weird [#1041].
  • livemap: when release the mouse button from outside the map, it gets stuck in panning mode [#1044].
  • Improve documentation for parameter position [#1047].
  • Error when build geom_smooth() with se=False [#1050].
  • Livemap: vjust implemented incorrectly [#1051].
  • Add tooltips for geom_curve() [#1053].
  • Incorrect position for bar annotations when specifying scale_x_reverse()/scale_y_reverse() [#1057].
  • Missing outer bar annotations when specifying scale_x_reverse()/scale_y_reverse() [#1058].
  • geom_density2d: the doc missing some 'computed' variables [#1062].
  • Weird and problematic behavior : lets-plot does not respect x and y. Sizing problem ?[#1068].
  • Plot layout breaks when marginal layers are used #1074 [#1074].
  • Discrete scale doesn't work for datetime data [LPK-231].
  • Add linetype parameter in elementLine() and elementRect() [LPK-235].
  • Any way to line-wrap facet labels? [LPK-237].
  • Missing marginal gridlines.
  • Cryptic error message on geom_boxplot with orientation="y" [#600].
  • set_theme() should accept "feature list" [#657].

[4.3.0] - 2024-03-07

Added

  • coord_polar()

    The polar coordinate system is most commonly used for pie charts, but
    it can also be used for constructing Spider or Radar charts using the flat option [#452].

    See: example notebook.

  • In the theme() function:

    • panel_inset parameter - primarily used for plots with polar coordinates.

      See: example notebook.

    • panel_border_ontop parameter - enables the drawing of panel border on top of the plot geoms.

    • panel_grid_ontop, panel_grid_ontop_x, panel_grid_ontop_y parameters - enable the drawing of grid lines on top of the plot geoms.

  • geom_curve()

    See: example notebook.

  • [UNIQUE] Visualizing graph-like data with geom_segment() and geom_curve().

    • Aesthetics size_start, size_end, stroke_start and stroke_end enable better alignment of
      segments/curves with nodes of the graph by considering the size of the nodes.

    • The spacer parameter allows for additional manual fine-tuning.

    See:

  • alpha_stroke parameter in geom_label() to enable the applying of alpha to color [#1029].

    See: example notebook.

  • Showing plots in external browser

    The setup_show_ext() directive allows plots to be displayed in an external browser window.

Changed

  • [BREAKING] Function geom_image() is removed. Please use geom_imshow() instead.
  • Parameter axis_ontop in theme() is now True by default.

Fixed

  • coord_map() should distort tiles size to account for different unit size at different latitudes [#331].
  • geom_errorbar(): wrong positioning of tooltips [#992].
  • geom_path(): tooltip position interpolation [#855].
  • Stacked bar-chart annotation: labels go out of the plot when zooming-in using coord_cartesian(xlim, ylim) [#981].
  • Facets: "free scales" options are ignored by discrete axis [#955].
  • Bar width is too large when x-domain is defined via x-scale limits [#1013].
  • How to hide only main tooltip? [LPK-#232].
  • Make middle strip in geomCrossbar() optional [LPK-233].
  • Can't set None for coord limit [#486].
  • Scale limits don't work for bars/area [LPK-219], [#978].
  • No gridlines when axis_ontop=True [#1012].
  • bar-plot: do not draw bar border adjacent to the axis [#845].
  • Displaying tooltips on a multilayer plot [#1030].
  • Make segment geometry better suited for graphs visualization [#572].

[4.2.0] - 2023-12-28

Added

  • Support for Categoricals:

    • Support for pandas.Categorical data type [#914].
    • The levels parameter in as_discrete() function [#931].

    See: example notebook.

  • Support for superscript for numbers in scientific notation [#743].

    Warning!

    Do NOT(!) use exponent_format='pow' if you are planning to export plot to a raster format (PNG,PDF).

    The CairoSVG library (which is under the hood of our ggsave() function) does not handle tspan element properly and breaks superscript notation when transforming SVG to PNG/PDF.

    More details: Kozea/CairoSVG#317

    See: example notebook.

  • Support exporting plot to a file-like object.
    Convenience methods: to_svg(), to_html(), to_png(), to_pdf() [#885], [#590].

    See: example notebook.

  • Sharing of X,Y-scale limits between subplots in gggrid() [#718].

    See: example notebook.

  • geom_spoke() [#738].

    See: example notebook.

  • scale_x_log2(), scale_y_log2() [#922].

  • High-contrast tileset "BW" for geom_livemap().

    See: example notebook.

  • New variables computed by 'count' and 'count2d' statistics: '..sumprop..', '..sumpct..' [#936].

    See: example notebook.

  • Support using dictionaries for breaks/labels/values customization in scale_xxx() functions [#169], [#882].

    See: example notebook.

  • The lablim parameter in scale_xxx() functions [#939, #946].

    See: example notebook.

  • label_text parameter in theme() for annotation text settings [#930].

    See: example notebook.

  • NumberFormat: new flag ~ to trim trailing zeros.

Changed

  • [BREAKING] Function margin() is deprecated and will be removed in future releases.
    Please replace all existing usages, i.e. theme(plot_margin=margin(..)) and element_text(margin=margin(..))
    with a list or with just a number:

    • a number or list of one number - the same margin it applied to all four sides;
    • a list of two numbers - the first margin applies to the top and bottom, the second - to the left and right;
    • a list of three numbers - the first margin applies to the top, the second - to the right and left, the third - to the bottom;
    • a list of four numbers - the margins are applied to the top, right, bottom and left in that order.

    See: example notebook.

  • Upgraded Apache Batik to version 1.17 [#887]

Fixed

  • Jitter reproducibility in geom_jitter, position_jitter, position_jitterdodge [#911].
  • Facets: order = 0 doesn't work as expected [#923].
  • geom_livemap: fix missing styles (e.g. road outline on high zooms) [#926].
  • geom_livemap: freeze at zoom 10 [#892].
  • Enormous CPU / Time/ Memory consumption on some data [#932].
  • gggrid: composite plot is not visible if saved with ggsave [#942].
  • gggrid doesn't override global theme [#966].
  • scale_continuous() fails with non-color aesthetics [#953].
  • NumberFormat: g format doesn't use e-notation for small numbers [#965].
  • Tooltips: graphical artifacts and bad performance in multi-line plot in Batik [#967].
  • Wrong tooltip position on geom_segment() with position adjustment [#963].

[4.1.0] - 2023-11-03

Added

Changed

  • [BREAKING] stat_summary() and stat_summary_bin no longer supports computing of additional variables specified in mappings.

Fixed

  • Husl palette equivalent [#876].
  • Tooltips are trimmed and not visible on a very narrow chart [#837].
  • geom_crossbar: an error occurs if the mapped values of aesthetics are not populated [#886].
  • Exception label is unresizeble, uncopyable and uncontrollable [#902].
  • Flickering during plot downsizing [#888].
  • Bad default formatting of numeric values in annotations [#905].
  • corr_plot: unexpected whitespace between the "geometry area" and the legend [#877].
  • scale_log: an option to generate only breaks which are integer powers of 10 needed [#850].
  • Trimmed legend when bounds of the rightmost X-axis tick label exceeds the axis length [#851].
  • HTML files exported using ggsave() are missing the encoding specification [#900].
  • plot_margin parameter in theme() [#856].
  • Subplot themes not inherited by parent [LPK-#197].
  • Saving plots in PDF format using ggsave() [#710].
  • element_blank() has no effect on plot title/subtitle/caption in theme() [#913].
  • Lollipop in legend is disproportionately large [LPK-216].
  • geomBar with fill, produces tooltips artefacts [#895].
  • Exception, when trying to build plot with column name containing line breakes [#894].
  • Added "grey" spelling for the gray color (earlier - "gray" only).

[4.0.1] - 2023-09-13

Added

Changed

  • If layer transparency is set via the alpha-channel in the colors RGBA specification and via the alpha aesthetic,
    then the alpha aesthetic overrides the alpha-channel in the color. Previousely it was the opposite.

  • geom_pie() defaults:

    • "stroke" is visible and stroke_side='both' (was stroke_side='outer').
    • the "hole" is not created automatically when stroke_side = 'both'/'inner' (was created automatically).

  • geom_bar() now has solid outline color by default (was transparent).

  • geom_tile(), geom_bin2d() now have solid outline color by default (was transparent).

    • however, by default the size is 0 (i.e. tiles outline initially is not visible).

Fixed

  • geom_tile(), geom_bin2d() : the alpha aesthetic is applied to the tiles outline.
  • scale_x_datetime(): error building plot for early dates [#346].
  • geom_livemap(): theme/flavor plot background is not shown [#857].
  • geom_livemap(): in AWT dragging a map in a facet moves maps in all facets.
  • geom_livemap(): support rectangle 'linetype' [#307].
  • theme_void() + flavor_xxx(): no expected plot background [#858].
  • Inconsistent color in legend when using paint_a/paint_b/paint_c [#867].

[4.0.0] - 2023-08-17

Added

Changed

  • The default qualitative color palette is now Color Brewer "Set1" (was "Set2")

  • Geometries default colors are now flavor-dependent: example notebook.

  • Geometries default size/line-width is now slightly bigger.

  • Point size is adjusted to match the width of a line of the same "size".

  • [BREAKING] geom_pie() no longer supports parameter stroke_color.

  • [BREAKING] geom_boxplot() no longer support parameter sampling.

  • [BREAKING] geom_pointrange(): size aesthetic shouldn't affect line width [#751]:

    linewidth aesthetic is used for line width, size - for mid-point size only.

  • geom_boxplot(): size and stroke parameters now affect outlier shapes.

  • [BREAKING, only affects users of Lets-Plot Kotlin API]
    The entire project has undergone package refactoring.
    As a result of package names changed, Lets-Plot v4.0.0 is partially incompatible
    with Lets-Plot Kotlin API versions 4.4.1 and earlier.

Fixed

  • ggsave() doesn't save geom_raster() layer to a file [#778].
  • ggsave(): saving geomImshow() to SVG produces fuzzy picture [LPK-188].
  • ggsave(): saving geomImshow() to raster format produces fuzzy picture.
  • geom_crossbar() aesthetics take middle argument instead of y [#804].
  • geom_boxplot() doesn't apply alpha to outliers [#754].
  • geom_boxplot() outliers do not show tooltips.
  • geom_step() no tooltips.
  • geom_step(): toggle the behavior of the direction parameter when the orientation is changed.
  • geom_livemap(): memory leak when re-run cells without reloading a page.
  • geom_ribbon(): not all tooltips are shown on a multi-layer plot [#847].
  • Bug in empty plot: IndexOutOfBoundsException [#194].
  • Weird tooltip/legend in case of extremely long value [#315].
  • panning on interactive map should be more responsive [#336].
  • Offline mode doesn't work with manylinux wheels [#808].

[3.2.0] - 2023-05-09

Added

  • geom_lollipop().

    See: example notebook.

  • Aesthetic stroke [#320] and its scales scale_stroke(), scale_stroke_identity().

    See: example notebook.

  • Aesthetic linewidth (for geom_lollipop()) and its scales scale_linewidth(), scale_linewidth_identity().

    See: example notebook.

  • The 'newline' character (\n) now works as line break in legend text ([#726])

    See: example notebook.

  • Horizontal error bars and vertical "dodge" ([#735]).

    See: example notebook.

  • Colorbar in geom_imshow(). Parameters show_legend and color_by [#717].

Changed

  • [BREAKING] geom_dotplot() and geom_ydotplot() no longer support parameter stat.

  • Position adjustment settings:

    • width, height parameters of geom_jitter() have priority over the width, height parameters of position_jitter() function;
    • nudge_x, nudge_y parameters of geom_text(), geom_label() have priority over x, y parameters of position_nudge() function.

  • geom_text(), geom_label() use stat='identity' by default.

  • JVM/Batik: improved "paint manager" which now has better performance and fixes issues with artifacts that could appear beyond the plot component.

Fixed

  • Batik: geom_imshow() fail with an error: "The attribute "xlink:href" of the element is required"
  • Batik: bug with usage of "&" [#713].
  • Categorical ordering, it's not respected for Boxplot and violin plot [#746].
  • Groups not sorted similarly when using facets [#679].
  • HTML export: exclude computation messages from the output [#725].
  • Image export not working with geom_imshow() and geom_raster() [LPK-175].
  • geom_segment() doesn't take into account the alpha [#748].
  • geom_density2d: Internal error with None values in data [#702].
  • DateTime metadata is not applied for scales other than X/Y [LPK-174].
  • Quantile should be shown in tooltip if the variable ..quantile.. is mapped to geom aesthetic.
  • Bad default formatting for stat variables [#654].
  • The scale name does not apply with as_discrete() [#653].
  • Tooltip is not shown when configured for 'const' value [#610].
  • Fix crash when try to add a constant to a tooltip (e.g."^size", where size aesthetic is specified with a number).
  • "Variable not found" error in ggmarginal [#681].
  • facet_grid: Internal error [#699].
  • Export to SVG fails if breaks are given by integers [#763].
  • Remove hard IPython dependency [#749].
  • Tooltips bug [LPK-176].
  • livemap: doesn't work well with gggrid [#750].
  • livemap: memory leak caused by a document event handler.
  • livemap: flickering when zooming with the buttons.
  • livemap: tooltip text doesn't reflect data under the cursor [#709].

[3.1.0] - 2023-03-07

Added

  • gggrid() function.

    See: example notebook.

  • joint_plot()

    See: example notebook.

  • Export to PNG files in ggsave().

    Note: export to PNG file requires the CairoSVG library.

    See: example notebook.

  • Axis position parameter in position scales scale_x_*(), scale_y_*().

    See: example notebook.

  • angle parameter in element_text() in theme().

    See: example notebook.

  • Additional "color" aesthetics: paint_a, paint_b, paint_c.

    These aesthetics are flexible and can be used as either "color" or "fill" as needed. See Multiple Color Scales demo.

    Also added a set of related "color scale" functions with the "aesthetic" parameter for configuring of additional color scales.

    See New "Scale" Functions demo.

  • Drawing quantile lines and filling quantile areas in geom_violin() and geom_density()

    See: example notebook.

  • geodesic parameter for geom_segment() and geom_path().

    See: example notebook.

  • density2d and density2df geometry types in residual_plot().

Changed

  • The MinGW toolchain is no longer required for installing of Lets-Plot on Windows.

  • [BREAKING] geom_violin() no longer supports parameter draw_quantiles. Use new quantile_lines and quantiles parameters as needed.

  • [BREAKING] stack and fill position adjustments now stack objects on top of each other only if these objects belong to different groups. If necessary, use mode="all"" in position_stack() or position_fill() to stack objects regardless of their group.

    See: example notebook.

Fixed

  • Tooltip does not reflect ..quantile.. aesthetic change [#658].
  • color_by parameter of the residual_plot() should group the data points [#662].
  • 'map_join': variable is lost after "stat" [#664].
  • Error when tooltip has variable mapped to aesthetic used by stat [#665].
  • Groups not sorted similarly when position='stack' [#673].
  • Area ridges: fill overlaps geometry borders when colors are repeated [#674].
  • livemap: hide tooltips when user is zooming-in by double-clicks [#659].
  • livemap: wrong position when path goes through the antimeridian [#682].
  • livemap: wrong position if path is on a circle of latitude [#683].
  • livemap: tooltip may show wrong data on density2df [#684].
  • livemap: geom_text vjust="center" is a bit off [#132].
  • livemap: segment that goes through the antimeridian should be straight [#692].
  • livemap: apply alpha to the pie chart and to its tooltip color marker.
  • Layout: uneven plot margins for the horizontal axis [#705].
  • Sampling: increase the default N for "pick sampling" and for other types of sampling [#687].

[3.0.0] - 2022-12-15

Added

Changed

  • [BREAKING] Dropped support for Python 3.6 as it is in the "end-of-life" of its release cycle.
  • [BREAKING] geom_livemap() itself no longer draws geometries, so the following options are no longer supported: symbol, data, mapping, map, map_join, ontop, stat, position, show_legend, sampling, tooltips. To draw point and pie markers on map, please, use the geom_point() and geom_pie() geometry layers.
  • Java/Swing platf.: Apache Batik upgraded to v.1.16 [#624], [LPK #140].
  • The default size is increased for the plot title and decreased for the caption.
  • Upgraded Kotlin version to 1.7.21 (was 1.7.20).

Fixed

  • Themes: can't change plot background after applying a "flavor" [#623].
  • Layout: uneven left/right, top/bottom plot margins [#625].
  • A plot building error with empty data on various geoms.
  • Precision error in gradient [#634].
  • geom_livemap: wrong position when datapoints geodesic line goes close to the N.P. [#645].

[2.5.1] - 2022-11-03

Added

  • geom_text(), geom_label():

    • the 'newline' character (\n) now works as line break ([#605])
    • lineheight aesthetic ([#324])
    • nudge_x, nudge_y parameters ([#324])
    • special text alignments (vjust and hjust): "inward" and "outward" ([#324])

    See: example notebook.

  • vjust parameter in position_stack() and position_fill() [#323].

    See: example notebook.

  • use_crs parameter in geom_map() and other geoms, working with GeoDataFrame

    See: example notebook.

  • geom_imshow() (former geom_image()):

  • image_matrix():

Changed

  • geom_image() renamed to geom_imshow()

    See updated examples: image 101, Fisher's boat.

  • geom_boxplot(): default value for parameter whisker_width is 0.5.

  • Upgraded Kotlin version to 1.7.20 (was 1.6.21).

Fixed

  • element_blank() has no effect in theme legend_title [#608].
  • geom_livemap(): add support of geom_label parameters [#601].
  • Tooltip: different formats for same aesthetic Y [#579].
  • Positioning with "constant" x/y doesn't work on axis with log10 transform [#618].
  • Positional "constant" doesn't honor axis limits [#619].
  • Parameter norm in geom_imshow().
  • Several issues leading to crush in Swing/Batik apps. Related to [discussions]
  • Text labels got trimmed occasionally, when symbols -, /, \ or | present.
  • geom_livemap() doesn't load vector tiles inside iframe with certain security policies.

[2.5.0] - 2022-09-29

Added

  • New theme: theme_bw() [#554].

    See: example notebook.

  • Color schemes (flavors) applicable to existing themes:

    • flavor_darcula()
    • flavor_solarized_light()
    • flavor_solarized_dark()
    • flavor_high_contrast_light()
    • flavor_high_contrast_dark()

    See: example notebook.

  • Viridis color scales: scale_color_viridis(), scale_fill_viridis().

    See: example notebook.

  • New parameters in element_text() [#562]:

  • The 'newline' character (\n) now works as line break in axis title.

    See: example notebook.

  • Parameter whisker_width in geom_boxplot() [#549].

    See: example notebook.

  • New geometry geom_label() [#557].

    See: example notebook.

  • Auto-detection of Databricks and NextJournal environments [#602].

  • Python wheels for manylinux arm64 architecture [#581].

Changed

  • New tooltip style after applying coord_flip() [#580].

    See: example notebook.

  • In Lets-Plot for Java/Swing, Apache Batik upgraded to v.1.15 [#604]

Fixed

  • Density and area geoms: preserve the z-order when grouping [#552].
  • Allow to import all 'bistro' functions just by '*' [#551].
  • Boxplot, violin, crossbar: position dodge width=0.95 should be used by default [#553].
  • Tooltip is shown not for the nearest object [#574].
  • Tooltip is not displayed for the object on the plots border [#575].
  • The plot caption overlaps with the legend [#587].
  • Unclear size unit of width [#589].
  • Specify size units in docstrings [#597].
  • No tooltips for geom_boxplot with zero height [#563].
  • geom_text: wrong label alignment with hjust 0 and 1 [#592].
  • Error when using lets-plot in streamlit [#595].
  • Documentation for the breaks parameter in scales [#507].

[2.4.0] - 2022-06-20

Added

  • Python 3.10 support [#505].

  • Python 3.9: a Python wheel for macOS arm64 architecture (Apple Silicon).

  • LetsPlot.set_theme() - configuring a default plot theme.

    See: example notebook.

  • Quantile-Quantile (Q-Q) plot:

    • geometries:
      • geom_qq()
      • geom_qq_line()
      • geom_qq2()
      • geom_qq2_line()
    • quick Q-Q : the qq_plot() function in the bistro module.

    See: example notebook.

  • Marginal plots: the ggmarginal() function [#200], [#384].

    See: example notebook.

  • Parameter orientation in geoms: bar, boxplot, density, histogram, freqpoly, smooth, violin.

    See: example notebook.

  • New in plot theme:

    • face parameter in element_text().

      See: example notebook.

    • panel_border parameter in theme() [#542].

      See: example notebook.

    • Tooltip theme options, new parameters in theme():

      • tooltip - tooltip rectangle options;
      • tooltip_text, tooltip_title_text - tooltip text options;
      • axis_tooltip_text, axis_tooltip_text_x, axis_tooltip_text_y - axis tooltip text options.

      See: example notebook.

  • scale_color_gradientn() and scale_fill_gradientn() functions [#504].

    See: example notebook.

Changed

  • geom_livemap [breaking change] : symbol="point" now should be specified explicitly to enable the "livemap" layer to handle provided "point" aesthetics directly. This change doesn't affect "points" layers added via the geom_point() geometry layer.
  • New style of tooltip color marker (two sidebars with a stroke color) and symbols in legend (rectangle with a stroke instead of a slash-line).
  • New type of general tooltip for geom_boxplot: displayed under the cursor.
  • Default sampling type for geom_violin switched from systematic to pick.

Fixed

  • geom_livemap: support of the arrow parameter in geom_segment [#131].
  • Differences in tooltip color marker for plots with and without livemap.
  • Labels out of plot when axis_text_y='blank' [#525].
  • NPE in corr_plot with null coefficients.
  • Outliers are not shown when boxplot' alpha=0.
  • Support for polars.DataFrame [#526].
  • JFX rendering issue that causes tooltips to stuck [#539].
  • Support trim parameter in density and ydensity stats [#62].
  • Unexpected point geometries on geom_livemap() [#547].
  • geom_violin: add missing parameters kernel, bw, adjust, n, fs_max to signature and docstring.

[2.3.0] - 2022-03-21

Added

  • Plot subtitle and caption [#417]: subtitle parameter in ggtitle() and labs(), caption parameter in labs(), plot_subtitle and plot_caption parameters in theme().

    See: example notebook.

  • The 'newline' character (\n) now works as line break in plot title, subtitle, caption and in legend title.

    See: example notebook.

  • New in tooltip customization API:

    • The title() option defines a tooltip "title" text which will always appear above the rest of the tooltip content.
    • The 'newline' character (\n) now works as line break in tooltips.
    • Automatic word wrap: occurs when the length of a text value in tooltip exceeds the 30 characters limit.

    See: example notebook.

  • Parameter scales in facet_grid()/facet_wrap() [#451, #479].

    See: example notebook.

  • New in geom_livemap():

    • The Reset button: returns the map widget to its initial zoom/location state.
    • Parameters data_size_zoomin, const_size_zoomin: allow configuring how zooming-in of the map widget increases size of geometry objects (circles, lines etc.) on map.
    • Parameter ontop that controls z-index of the geom_livemap layer.
    • Parameter show_coord_pick_tools to show "copy location" and "draw geometry" buttons.

  • New geometries:

    • geom_violin()

    See: example notebook.

    • geom_dotplot()

    See: example notebook.

    • geom_ydotplot()

    See: example notebook.

Changed

  • New tooltip style: rounded corners, bold label, colored marker inside the tooltip.
  • Deprecated tooltip customization API: function color() will be removed in one of the future releases.
  • 'Auto shrink': plots automatically shrink when necessary to fit width of the output (notebook) cell [#488].

Fixed

  • LiveMap, Swing-batik: legend is not visible when overlapping map [#496].
  • CVE-2021-23792 in org.jetbrains.lets-plot:lets-plot-image-export@2.2.1 [#497].
  • Color in tooltip does not correspond to the color of marker on map [#227].
  • tooltip on livemap: hide tooltip when the cursor is over the controls [#335].
  • Automatic detection of DateTime series [#99].
  • Fix tooltips for geom_histogram(stat='density').
  • The axis tooltip overlaps the general tooltip [#515].
  • The multi-layer tooltip detection strategy will only be used if more than one layer provides tooltips.
  • scaleColorManual Divide by Zero with 1 mapping [#506].
  • LinearBreaksHelper$Companion.computeNiceBreaks out of memory error [#105].

[2.2.1] - 2021-12-10

Added

  • scale_x_time() and scale_y_time() [#468].

    See: example notebook.

  • plot_background, legend_background parameters in theme() [#485].

  • axis_ontop, axis_ontop_x, axis_ontop_y parameters in theme()

Fixed

  • Coord system limits do not work with x/y scale with transform [#474].
  • Provide 0-23 hour formatting [#469].
  • No tooltip shown when I'm trying to add an empty line [#382].
  • coord_fixed() should adjust dimensions of "geom" panel accordingly [#478].
  • The tooltip dependence on number of factors works separately by layers [#481].
  • Tooltip on y-axis looks wrong [#393].
  • Is kotlin-reflect really needed for lets-plot? [#471].

[2.2.0] - 2021-10-29

Added

  • coord_flip().

    See: example notebook.

  • Date-time formatting support:

    • tooltip format() should understand date-time format pattern [#387];
    • scale_x_datetime should apply date-time formatting to the breaks [#392].

    See: example notebook.

  • Pre-configured themes:

    • Standard ggplot2 themes: theme_grey(), theme_light(), theme_classic(), theme_minimal();
    • Other themes: theme_minimal2() - the default theme, theme_none().

  • Theme modification: more parameters were added to the theme() function.

    See: example notebook.

Note: fonts size, family and face still can not be configured.

  • corr_plot() function now also accepts pre-computed correlation coefficients. I.e. the following two expressions are equivalent:
    corr_plot(iris_df).points().labels().build()
    corr_plot(iris_df.corr()).points().labels().build()  # new

Changed

  • The size of fonts on plot was slightly increased all across the board.
  • The default plot size was increased by 20%, it's now 600x400 px.
  • Deprecated API: stat_corr() and "correlation stat" will be removed in one of the future releases. Please use the corr_plot() plot builder object instead.

Fixed

  • Ordering facets - the "order" value 0 disables facet ordering [#454].
  • Tooltips for discrete variables: add the dependence of the tooltip on the number of factors. The X-axis tooltip is always shown for discrete data.
  • map_join doesn't work when join variables with same names without mappings [#428].
  • Zoom without clipping breaks tooltips [#373].
  • Unreadable breaks on axis [#430].
  • Map rendering is broken when browser uses scaling [#450].
  • corr_plot() error for data with zero variation [#329].
  • Misleading error message [#271].

[2.1.0] - 2021-08-16

Added

  • Ordering categories. New parameters in the as_discrete function:

    • order_by (string) - the name of the variable by which the ordering will be performed;
    • order (int) - the ordering direction - 1 for ascending direction and -1 for descending (default value).

    See: as_discrete.

  • Basemap tiles configuring:

    • Subdomains parameter {s} for XYZ raster tiles.
    • Solid color tiles: maptiles_solid().
    • Builtin configurations for some 3rd party maptile services. The lets_plot.tilesets module.

    See: Configuring basemap tiles.

Changed

  • Upgraded Apach Batik version to 1.14 (was 1.12) [#398].
  • Upgraded Kotlin version to 1.5.21 (was 1.4.21)
  • Upgraded Gradle version to 7.1.1 (was 6.8.3)

Fixed

  • geom_livemap: properly handle max_zoom pamareter in maptiles_zxy().
  • Strange looking legend for tiles [#245].
  • Need to skip "bad" values during scale transformation [#301].
  • NPE on negative value in data and scale_xxx(trans='log10') [#292].
  • Legend is broken when using scale_fill_brewer with 'trans' parameter [#284].
  • Scale breaks should be distributed evenly on 'sqrt' scale. [#407].
  • Wrong tooltip formatting when used with log10 scales [#406].
  • Bad axis labels when using both plot and layer data [#327].
  • Plot layout looks wrong [#403].
  • map_join is not working correctly when map=geocoder [#380]
  • Tooltip default formatting should not change after adding other variables to tooltip [#388].
  • Tooltip on axis: increase the font size. [#399].
  • Tooltip format for variable is not working [#401].
  • Wrong direction in colorbars (legend) [#204].
  • geom_jitter: show axis tooltips (same as geom_point) [#412].
  • Outlier tooltips: the spout sometime is too long (boxplot) [#358].
  • Faceted plot is broken by geom with "constant" aesthetics [#391].
  • Interactive maps in AWT (PyCharm plugin):
    • Memory leaks in PyCharm caused by dispose() method in PlotPanel.
    • While showing map in PyCharm CPU is busy all the time, even when nothing is changing on screen.
    • Click events detection.

[2.0.4] - 2021-06-09

Changed

  • Upgraded kotlinx.html version to 0.7.3 (was 0.7.2)

In JVM projects it's no longer necessary to add https://maven.pkg.jetbrains.space/public/p/kotlinx-html/maven repository to the project configuration.

Fixed

  • Multilayer plots are corrupted [#385].

[2.0.3] - 2021-06-02

Added

  • In tooltip customization API:
    • layer_tooltips(variables) - the new parameter variables defines a list of variable names, which values will be placed line by line in the general tooltip. See: Tooltip Customization.

Changed

  • CDN: Lets-Plot JavaScript library is now served via JSDELIVR (was CDNJS):

https://cdn.jsdelivr.net/gh/JetBrains/lets-plot@v2.0.3/js-package/distr/lets-plot.min.js

Fixed

  • Removed the last dependency on bintray JCenter (commit).
  • geom_boxplot: should be possible to create boxplot without specifying x-series [#325]
  • geom_hline: graph plotted outside of coordinate plane visible part [#334]
  • Draw geometry only once if layer has no aes mapping specified [#73]
  • map: calif.housing [#140]
  • Can't build plot: "Uncaught SyntaxError: Unexpected string" in a console [#371]
  • All scales should have the 'format' parameter [#347].
  • Poor font rendering in Swing/Batik. Related to: [#364]
  • Exclude slf4j implementation from lets-plot-common [#374]

[2.0.2] - 2021-04-13

Changed

[2.0.1] - 2021-03-17

Added

  • The alpha parameter for lines [#139].
  • Tooltips for geom_segment() [#296].
  • The guides() function [#52].
  • New Java Swing plot components to enable embedding Lets-Plot charts into JVM applications.
    • See: vis-swing-common, vis-swing-batik, vis-swing-jfx modules.

Fixed

  • Fix auto-detection of PyCharm env to enable plotting in SciView while using remote interpreter [348]
  • Fix tooltips appearing outside the specified x/y limits.
  • Clippath in accordance to the given limits [#189].
  • Treat a data as DataFrame if both data and map are GeoDataFrames [#343].
  • Removed the restriction on tooltips for small polygons [#298].
  • The x/y axis labels are derived from x/y aesthetics only [#333].
  • Merge 'theme' settings [#147].
  • Add axis tooltips for geom_bin2d.
  • Outlier tooltips for geom_ribbon().
  • Fix tooltip crosshair [#309].

[2.0.0] - 2021-02-09

Added

  • Python 3.9 support on all platforms.

  • facet_wrap() function [#238]

  • In facets:

    • Ascending/descending ordering of faceting values.
    • Formatting of faceting values.

    See: Facets demo

  • In tooltip customization API:

    • option color overrides the default tooltip color: 
      geom_xxx(tooltips=layer_tooltips().color('red'))

    See: Tooltip Customization.

  • Crosshair cursor when tooltip is in fixed position specified by the anchor option.

  • Scale format parameter: formatting tick labels on X/Y axis. Supported types are number and date/time.

    Example:

    scale_x_datetime(format="%b %Y")
scale_x_continuous(format='is {.2f}')

    Demo: Formatting demo

    See also: Formatting

Changed

  • [breaking change] New Geocoding API!

    Since Lets-Plot v2.0.0 the peviouse Geocoding API is no longer working (hence we bumped the version to 2.0.0).

    The old version of the Geocoding backend remains on-line for a couple of release cycles to continue support of prior versions of Lets-Plot.

    To learn more about Geocoding API see: Geocoding.

  • The project upgraded to Kotlin v1.4.21 (was v1.4.10).

Fixed

  • Kernel density estimate computation is too slow.
  • Serialize NaN and other special values as None (CRITICAL for the "Lets-Plot in SciView" PyCharm plugin) [#282].
  • Error in plot building: 'trans' parameter not compatible with None values in data [#287].
  • LOESS smoothing fails on small (<3) number points.
  • Facet grid truncated in jupyter [#28].
  • The reverse parameter on discrete scale with 'limits' [#303].
  • Geocoder's allow_ambiguous() doesn't prevent "ValueError: Multiple objects.." [#174].
  • Fix tooltip for overlapping objects [#230].
  • Fix duplicate values in tooltip [#280].
  • geom_histogram should not try to handle geometries in GeoDataFrame [#281].
  • Error building plot: Layer 'MAP' is not supported on Live Map. [#285].
  • Align title to the left of the plot geom area [#289].
  • Tooltip on geom_ribbon().

[1.5.6] - 2020-12-23

Fixed

  • “Symbol not found: _NSGenericException” error on macOS [#276].

[1.5.5] - 2020-12-18

Added

  • Correlation plot.

    See: Charts.

  • 'No Javascript' mode.

    Support for notebook renderers that don't execute Javascript.

    See: 'No Javascript' mode

  • In tooltip customization API:

    • options: center and middle (anchor).
    • option 'minWidth'.

    See: Tooltip Customization.

  • 'na_text' parameter in 'geom_text'

Changed

  • Tooltip customization API:

    • The anchor option moved from theme to layer: 
      geom_xxx(tooltips=layer_tooltips().anchor(anchor_value))
      where anchor_value: ['top_right'|'top_center'|'top_left'|'bottom_right'|'bottom_center'|'bottom_left'|'middle_right'|'middle_center'|'middle_left'].

    See: Tooltip Customization.

Fixed

  • Tooltip should appear when the mapped data is continuous [#241]
  • Tooltip 'null' displayed for undefined vals [#243]
  • Y-tooltip should be aligned with a tile center [#246]
  • With facet_grid tooltip shows data from last plot on all plots [#247]

[1.5.4] - 2020-11-19

Changed

  • [breaking change] In functions format(field, format) and line(template) in tooltip builder, the '$' symbol is no longer used in aesthetic reference. It was replaced by the '^' (hat) symbol (see the udated doc: Tooltip Customization).
  • The project upgraded to Kotlin v1.4.10 (was v1.3.72).

Fixed

  • No tooltip on v-line [#229]

[1.5.3] - 2020-11-05

Added

  • Facilities for customization of tooltip contents and its position (see Tooltip Customization).
  • attribution and other new parameters in the maptiles_zxy() function.
  • label_format parameter in the geom_text() function.
  • scale_x_discrete_reversed() / scale_y_discrete_reversed()
  • ggsave() function (only SVG, HTML)

Fixed

  • Mercator's projection computes coordinates incorrectly (geom_map(), coord_map())
  • Handling of xlim,ylim in coord_fixed(), coord_map()
  • Colorbars: take in account limits defined in continuous color/fill scales.
  • scale_color_hue incorrectly interprets chroma range [#206].
  • scale_color_brewer shouldn't fail if 'type' is not specified [#203].
  • scale_fill_discrete should not replace the default discrete scale (Brewer) with 'HUE' scale [#172].

Changed

  • Lets-plot vector map-tiles are configured by default.
  • PACIFIC_BLUE color (#118ED8) replaced DARK_BLUE as a default color/fill value on plots.
  • Default discrete color scheme is now ColorBrewer's Set2 (was Dark2)

Deprecated

  • Function gg_image_matrix(). The new function is: image_matrix() in the lets_plot.bistro.im module. The new function is not any longer displaying matrix by itself but returns a GGBunch object instead. Unlike the depricated gg_image_matrix() function, it is not imported by from lets_plot import * statement.

    Usage:

    from lets_plot.bistro.im import image_matrix
image_matrix()

[1.5.2] - 2020-08-10

Fixed

  • map_titanic.ipynb : UnboundLocalError: local variable 'map_join' referenced before assignment [#182]
  • Add the map_join parameter to all geoms which support map parameter (py) [#183]

[1.5.1] - 2020-08-06

Added

  • scale_x_reverse() / scale_y_reverse()
  • Mnemonics for the resolution parameter in the regions.boundaries() function.

Fixed

  • Exception when using coord_map with xlim [#173]
  • Clipped tooltip [#155]
  • Text on axis is clipped after hiding the tick-marks in theme [#160]
  • Tooltip on x axis with no title shouldn't be above the axis line [#161]
  • NPE while creating scale mapper when data series contains only nulls.
  • Default Geocoding server url.

[1.5.0] - 2020-07-15

Added

  • geocoding package

Fixed

  • NPE on geom_tile when data contains null-s.
  • The order of values in the limits parameter on discrete scales is ignored.
  • Livemap is not shown in GGBunch.

[1.4.2] - 2020-05-28

Added

  • Plugin for IntelliJ IDEA / PyCharm is available. For more info see the plugin homepage: Lets-Plot in SciView.

Changed

  • Plots build time reduced (up to 4X)

[1.4.1] - 2020-05-20

Added

  • geom_smooth: automatic sampling when n>1000 and the method is LOESS.

Fixed

  • 'map_join' fails when the map argument is a dictionary [#130]

Changed

  • HTML output was modified allow better integration with PyCharm.

Removed

  • The deprecated method 'load_lets_plot_js()'.

[1.4.0] - 2020-05-13

Added

  • Support for interactive maps.
  • The as_discrete() function.
  • Polynomial regression of an arbitrary degree (thelm smoothing method) in geom_smooth.
  • axis_tooltip, axis_tooltip_x, axis_tooltip_y parameters in theme()
  • Kaggle and Datalore notebook demos.

Fixed

  • Severe performance degradation when using discrete scales [#119].
  • Opaque background to better support PyCharm dark theme [#121].
  • Auto-detection of a Kaggle environment.
  • Limits on the maximum plot size [#115].
  • Installation instructions for Windows users [#118 MinGW].

Changed

  • More slick shape for tooltips on the axis.

[1.3.0] - 2020-03-26

Added

  • Python 3.6 support.
  • Windows platform support.
  • SVG/HTML export to file.
  • Offline mode for Jupyter notebooks.
  • Support for cloud-based notebooks like Google Colab and Datalore.
  • JVM Maven artefacts released.

Fixed

  • Tooltip on geom_rect and geom_vline.
  • Error when date-time series contains NaT value.

Changed

  • Optional load_lets_plot_js() function is now deprecated.
  • Initialisation call LetsPlot.setup_html() is now mandatory in Jupyter.

[1.2.1] - 2020-02-13

Fixed

  • tooltip not showing in geom_polygon

[1.2.0] - 2020-02-12

Added

  • geopandas support in geoms: point, path, polygon, rect, text.
  • support for LOESS smoothing method in geom_smooth.
  • new geometry layers: geom_crossbar, geom_linerange, geom_pointrange, geom_bin2d.
  • support for coordinate stystem xlim, ylim parameters (i.e. "clipping").

Fixed

  • Was not working weight parameter in stats: bin, count, bin2d, density, density2d
  • incorrect tooltip line 'NaN' in geom_boxplot.
  • ambiguous tooltip positioning in geoms: tile, bin2d.
  • cropped text in tooltip.

[1.1.0] - 2019-12-17

Added

  • GGBunch. Combines several different plots into one graphical object.
  • geom_image(). Displays an image specified by ndarray with shape (n,m) or (n,m,3) or (n,m,4).
  • gg_image_matrix(). A utility helping to combine several images into one graphical object.
  • user_guide.ipynb
  • ggbunch.ipynb
  • scatter_matrix.ipynb
  • image_101.ipynb
  • image_fisher_boat.ipynb
  • image_matrix.ipynb

Changed

  • Switched to Kotlin 1.3.61

Fixed

  • scale_datetime(). Date-time formatting in tooltips.
  • Links in README_PYTHON.md

[1.0.0] - 2019-11-27

Changed

  • First public release.