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v0.8.2

22 Apr 12:34
@philss philss
v0.8.2
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v0.8.2 Latest
Latest

Added

  • Add functions to work with strings and regexes.

    Some of the functions have the prefix "re_", because they accept a string that represents a regular expression.

    There is an important detail: we do not accept Elixir regexes, because we cannot guarantee that the backend supports it. Instead we accept a plain string that is "escaped". This means that you can use the ~S sigil to build that string.
    Example: ~S/(a|b)/.

    The added functions are the following:

    • Explorer.Series.split_into/3 - split a string series into a struct of string fields. This function accepts a string as a separator.

    • Explorer.Series.re_contains/2 - check is the string series matches the regex pattern. Like the "non regex" counterpart, it returns a boolean series.

    • Explorer.Series.re_replace/3 - replaces all occurences of a pattern with replacement in string series. The replacement can refer to groups captures by using the ${x}, where x is the group index (starts with 1) or name.

    • Explorer.Series.count_matches/2 - count how many times a substring appears in a string series.

    • Explorer.Series.re_count_matches/2 - count how many times a pattern matches in a string series.

    • Explorer.Series.re_scan/2 - scan for all matches for the given regex pattern.
      This is going to result in a series of lists of strings - {:list, :string}.

    • Explorer.Series.re_named_captures/2 - extract all capture groups as a struct for the given regex pattern. In case the groups are not named, their positions are used as names.

  • Enable the usage of system certificates if OTP version 25 or above.

  • Add support for the :streaming option in Explorer.DataFrame.to_csv/3.

  • Support operations with groups in the Lazy Polars backend. This change makes the lazy frame implementation more useful, by supporting the usage of groups in following functions:

    • Explorer.DataFrame.slice/3

    • Explorer.DataFrame.head/2

    • Explorer.DataFrame.tail/2

    • Explorer.DataFrame.filter_with/2 and the macro version of it, filter/2.

    • Explorer.DataFrame.sort_with/3, although it ignores "maintain order" and "nulls last" options when used with groups.

    • Explorer.DataFrame.mutate_with/2 and its macro version, mutate/2.

Changed

  • We now avoid raising an exception if a non existent column is used in Explorer.DataFrame.discard/2.

  • Make the dependency of cacerts optional. This is because people using Erlang/OTP 25 or above can use the certificates provided by the system.
    So you may need to add the dependency of cacerts if your OTP version is older than that.

  • Some precision differences in float operations may appear. This is due to an update in the Polars version to "v0.38.1". Polars is our default backend.

Fixed

  • Fix Explorer.Series.split/2 inside the context of Explorer.Query.

  • Add optional X-Amz-Security-Token header to S3 request. This is needed in case the user is passing down a token for authentication.

  • Fix Explorer.DataFrame.sort_by/3 with groups to respect :nils option.
    This is considering only the eager implementation.

  • Fix inspection of lazy frames in remote nodes.

Pull requests

  • Bump Polars 0.37 by @lkarthee in #861
  • DataFrame.discard/2 - don't raise for non existent column by @lkarthee in #872
  • Add native expression for Series.split/2 by @H12 in #875
  • Bump mio from 0.8.10 to 0.8.11 in /native/explorer by @dependabot in #876
  • Implements Series.split_into/3 by @ryancurtin in #873
  • Update Polars to v0.38 by @philss in #879
  • Add optional x-amz-security-token header to S3 request by @jschniper in #881
  • Rewrite LazyFrame by @philss in #882
  • Update Rustler to v0.32.1 by @philss in #884
  • Fix DF.sort_by/3 with groups to respect :nils option by @philss in #886
  • Update Polars to v0.38.3 by @philss in #887
  • Implements :streaming option for DataFrame.to_csv/3 by @ryancurtin in #889
  • Support operations with groups in the Lazy Polars backend by @philss in #890
  • Bump h2 from 0.3.25 to 0.3.26 in /native/explorer by @dependabot in #891
  • Revert LazyFrame implementation with stack by @philss in #892
  • Refactor eager DF implementation to make use of lazy backend by @philss in #893
  • Add re_contains/2 and re_replace/3 to match with a regex by @philss in #894
  • Add count_matches/2, re_count_matches/2, re_scan/2 and re_named_captures/2 to Series by @philss in #895
  • Add changes to the change log for the upcoming version by @philss in #897
  • Update dependencies by @philss in #899
  • Pass down backend to lazy series and enable re_named_captures/2 usage by @philss in #896
  • Release v0.8.2 by @philss in #900

New Contributors

SHA 256 of Artifacts

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Full Changelog: v0.8.1...v0.8.2

Contributors

philss, ryancurtin, and 4 other contributors
Assets 15

v0.8.1

24 Feb 21:29
@philss philss
v0.8.1
bfdf07b
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v0.8.1

Added

  • Add Explorer.Series.field/2 to extract a field from a struct series.
    It returns a new series with the field's dtype.

  • Add Explorer.Series.json_decode/2 that can decode a string series containing valid JSON objects according to dtype.

  • Add eager count/1 and lazy size/1 to Explorer.Series.

  • Add support for maps as expressions inside Explorer.Query. They are "converted" to structs.

  • Add json_path_match/2 to extract a string series from a string containing valid JSON objects.
    See the article JSONPath - XPath for JSON for details about JSON paths.

  • Add Explorer.Series.row_index/1 to retrieve the index of rows starting from 0.

  • Add support for passing the :on column directly (instead of inside a list) in Explorer.DataFrame.join/3.

Changed

  • Remove some deprecated functions from documentation.

  • Change internal representation of the :struct dtype to use list of tuples instead of a map to represent the dtypes of each field. This shouldn't break because we normalise maps to lists when a struct dtype is passed in from_list/2 or cast/2.

  • Update Rustler minimum version to ~> 0.31. Since Rustler is optional, this shouldn't affect most of the users.

Fixed

  • Fix float overflow error to avoid crashing the VM, and instead it returns an argument error.

  • Fix Explorer.DataFrame.print/2 for when the DF contains structs.

Pull requests

New Contributors

Full Changelog: v0.8.0...v0.8.1
Official Changelog: https://hexdocs.pm/explorer/changelog.html

SHA256 of precompiled artifacts

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Contributors

filmor, ahamez, and 5 other contributors
Assets 15

v0.8.0

20 Jan 17:43
@philss philss
v0.8.0
e0e242b
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v0.8.0

Added

  • Add explode/2 to Explorer.DataFrame. This function is useful to expand the contents of a {:list, inner_dtype} series into a "inner_dtype" series.

  • Add the new series functions all?/1 and any?/1, to work with boolean series.

  • Add support for the "struct" dtype. This new dtype represents the struct dtype from Polars/Arrow.

  • Add map/2 and map_with/2 to the Explorer.Series module.
    This change enables the usage of the Explore.Query features in a series.

  • Add sort_by/2 and sort_with/2 to the Explorer.Series module.
    This change enables the usage of the lazy computations and the Explorer.Query module.

  • Add unnest/2 to Explorer.DataFrame. It works by taking the fields of a "struct" - the new dtype - and transform them into columns.

  • Add pairwise correlation - Explorer.DataFrame.correlation/2 - to calculate the correlation between numeric columns inside a data frame.

  • Add pairwise covariance - Explorer.DataFrame.covariance/2 - to calculate the covariance between numeric columns inside a data frame.

  • Add support for more integer dtypes. This change introduces new signed and unsigned integer dtypes:

    • {:s, 8}, {:s, 16}, {:s, 32}
    • {:u, 8}, {:u, 16}, {:u, 32}, {:u, 64}.

    The existing :integer dtype is now represented as {:s, 64}, and it's still the default dtype for integers. But series and data frames can now work with the new dtypes. Short names for these new dtypes can be used in functions like Explorer.Series.from_list/2. For example, {:u, 32} can be represented with the atom :u32.

    This may bring more interoperability with Nx, and with Arrow related things, like ADBC and Parquet.

  • Add ewm_standard_deviation/2 and ewm_variance/2 to Explorer.Series.
    They calculate the "exponentially weighted moving" variance and standard deviation.

  • Add support for :skip_rows_after_header option for the CSV reader functions.

  • Support {:list, numeric_dtype} for Explorer.Series.frequencies/1.

  • Support pins in cond, inside the context of Explorer.Query.

  • Introduce the :null dtype. This is a special dtype from Polars and Apache Arrow to represent "all null" series.

  • Add Explorer.DataFrame.transpose/2 to transpose a data frame.

Changed

  • Rename the functions related to sorting/arranging of the Explorer.DataFrame.
    Now arrange_with is named sort_with, and arrange is sort_by.

    The sort_by/3 is a macro and it is going to work using the Explorer.Query module. On the other side, the sort_with/2 uses a callback function.

  • Remove unnecessary casts to {:s, 64} now that we support more integer dtypes.
    It affects some functions, like the following in the Explorer.Series module:

    • argsort
    • count
    • rank
    • day_of_week, day_of_year, week_of_year, month, year, hour, minute, second
    • abs
    • clip
    • lengths
    • slice
    • n_distinct
    • frequencies

    And also some functions from the Explorer.DataFrame module:

    • mutate - mostly because of series changes
    • summarise - mostly because of series changes
    • slice

Fixed

  • Fix inspection of series and data frames between nodes.

  • Fix cast of :string series to {:datetime, any()}

  • Fix mismatched types in Explorer.Series.pow/2, making it more consistent.

  • Normalize sorting options.

  • Fix functions with dtype mismatching the result from Polars.
    This fix is affecting the following functions:

    • quantile/2 in the context of a lazy series
    • mode/1 inside a summarisation
    • strftime/2 in the context of a lazy series
    • mutate_with/2 when creating a column from a NaiveDateTime or Explorer.Duration.

Pull requests

New Contributors

Read more

Contributors

JonGretar, kellyfelkins, and 9 other contributors
Assets 15

v0.7.2

30 Nov 20:21
@github-actions github-actions
v0.7.2
e585012
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philss Philip Sampaio
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v0.7.2

Added

  • Add the functions day_of_year/1 and week_of_year/1 to Explorer.Series.

  • Add filter/2 - a macro -, and filter_with/2 to Explorer.Series.

    This change enables the usage of queries - using Explorer.Query - when
    filtering a series. The main difference is that series does not have a
    name when used outside a dataframe. So to refer to itself inside the
    query, we can use the special _ variable.

      iex> s = Explorer.Series.from_list([1, 2, 3])
  iex> Explorer.Series.filter(s, _ > 2)
  #Explorer.Series<
    Polars[1]
    integer [3]
  >

  • Add support for the {:list, any()} dtype, where any() can be any other
    valid dtype. This is a recursive dtype, that can represent nested lists.
    It's useful to group data together in the same series.

  • Add Explorer.Series.mode/2 to get the most common value(s) of the series.

  • Add split/2 and join/2 to the Explorer.Series module.
    These functions are useful to split string series into {:list, :string},
    or to join parts of a {:list, :string} and return a :string series.

  • Expose ddof option for variance, covariance and standard deviation.

  • Add a new {:f, 32} dtype to represent 32 bits float series.
    It's also possible to use the atom :f32 to create this type of series.
    The atom :f64 can be used as an alias for {:f, 64}, just like the
    :float atom.

  • Add lengths/1 and member?/2 to Explorer.Series.
    These functions work with {:list, any()}, where any() is any valid dtype.
    The idea is to count the members of a "list" series, and check if a given
    value is member of a list series, respectively.

  • Add support for streaming parquet files from a lazy dataframe to AWS S3
    compatible services.

Changed

  • Remove restriction on pivot_wider dtypes.
    In the early days, Polars only supported numeric dtypes for the "first"
    aggregation. This is not true anymore, and we can lift this restriction.

  • Change :float dtype to be represented as {:f, 64}. It's still possible
    to use the atom :float to create float series, but now Explorer.Series.dtype/1
    returns {:f, 64} for float 64 bits series.

Fixed

  • Add missing implementation of Explorer.Series.replace/3 for lazy series.

  • Fix inspection of DFs and series when limit: :infinity is used.

Removed

  • Drop support for the riscv64gc-unknown-linux-gnu target.

    We decided to stop precompiling to this target because it's been hard to maintain it.
    Ideally we should support it again in the future.

Pull requests

New Contributors

Full Changelog: v0.7.1...v0.7.2
Official Changelog: https://github.com/elixir-explorer/explorer/blob/main/CHANGELOG.md

Checksums

The list below if the SHA256 checksums of the precompiled artifacts.

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Contributors

rodrigues, maennchen, and 5 other contributors
Assets 15

v0.7.1

25 Sep 16:28
@philss philss
v0.7.1
96a108d
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v0.7.1

Added

  • Add more temporal arithmetic operations. This change makes possible
    to mix some datatypes, like date, duration and scalar types like
    integers and floats.

    The following operations are possible now:

    • date - date
    • date + duration
    • date - duration
    • duration + date
    • duration * integer
    • duration * float
    • duration / integer
    • duration / float
    • integer * duration
    • float * duration

  • Support lazy dataframes on Explorer.DataFrame.print/2.

  • Add support for strings as the "indexes" of Explorer.Series.categorise/2.
    This makes possible to categorise a string series with a categories series.

  • Introduce cond/1 support in queries, which enables multi-clause conditions.
    Example of usage:

        iex> df = DF.new(a: [10, 4, 6])
    iex> DF.mutate(df,
    ...>   b:
    ...>     cond do
    ...>       a > 9 -> "Exceptional"
    ...>       a > 5 -> "Passed"
    ...>       true -> "Failed"
    ...>     end
    ...> )
    #Explorer.DataFrame<
      Polars[3 x 2]
      a integer [10, 4, 6]
      b string ["Exceptional", "Failed", "Passed"]
    >

  • Similar to cond/1, this version also introduces support for the if/2
    and unless/2 macros inside queries.

  • Allow the usage of scalar booleans inside queries.

  • Add Explorer.Series.replace/3 for string series.
    This enables the replacement of patterns inside string series.

Deprecated

  • Deprecate Explorer.DataFrame.to_lazy/1 in favor of just lazy/1.

Fixed

  • Fix the Explorer.Series.in/2 function to work with series of the
    :category dtype.

    Now, if both series shares the same categories, we can compare them.
    To make sure that a categorical series shares the same categories from
    another series, you must create that series using the
    Explorer.Series.categorise/2 function.

  • Display the dtype of duration series correctly in Explorer.DataFrame.print/2.

Pull requests

New Contributors

Full Changelog: v0.7.0...v0.7.1
Official Changelog: https://github.com/elixir-explorer/explorer/blob/main/CHANGELOG.md

SHA256 of compiled artifacts

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Contributors

josevalim, clm-a, and 3 other contributors
Assets 12

v0.7.0

28 Aug 13:34
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v0.7.0
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v0.7.0

Added

  • Enable reads and writes of dataframes from/to external file systems.

    It supports HTTP(s) URLs or AWS S3 locations.

    This feature introduces the FSS abstraction,
    which is also going to be present in newer versions of Kino. This is going to make the integration
    of Livebook files with Explorer much easier.

    The implementation is done differently, depending on which file format is used, and if
    it's a read or write. All the writes to AWS S3 are done in the Rust side - using an abstraction
    called CloudWriter -, and most of the readers are implemented in Elixir, by doing a download
    of the files, and then loading the dataframe from it. The only exception is the reads of
    parquet files, which are done in Rust, using Polars' scan_parquet with streaming.

    We want to give a special thanks to Qqwy / Marten for the
    CloudWriter implementation!

  • Add ADBC: Arrow Database Connectivity.

    Continuing with improvements in the IO area, we added support for reading dataframes from
    databases using ADBC, which is similar in idea to ODBC, but integrates much better with
    Apache Arrow, that is the backbone of Polars - our backend today.

    The function Explorer.DataFrame.from_query/1 is the entrypoint for this feature, and it
    allows quering databases like PostgreSQL, SQLite and Snowflake.

    Check the Elixir ADBC bindings docs for more information.

    For the this feature, we had a fundamental contribution from Cocoa
    in the ADBC bindings, so we want to say a special thanks to her!

    We want to thank the people that joined José in his live streamings on Twitch,
    and helped to build this feature!

  • Add the following functions to Explorer.Series:

  • Add duration dtypes. This is adds the following dtypes:

    • {:duration, :nanosecond}
    • {:duration, :microsecond}
    • {:duration, :millisecond}

    This feature was a great contribution from Billy Lanchantin,
    and we want to thank him for this!

Changed

  • Return exception structs instead of strings for all IO operation errors, and for anything
    that returns an error from the NIF integration.

    This change makes easier to define which type of error we want to raise.

  • Update Polars to v0.32.

    With that we made some minor API changes, like changing some options for cut/qcut operations
    in the Explorer.Series module.

  • Use nil_values instead of null_character for IO operations.

  • Never expect nil for CSV IO dtypes.

  • Rename Explorer.DataFrame.table/2 to Explorer.DataFrame.print/2.

  • Change :datetime dtype to be {:datetime, time_unit}, where time unit can be
    the following:

    • :millisecond
    • :microsecond
    • :nanosecond

  • Rename the following Series functions:

    • trim/1 to strip/2
    • trim_leading/1 to lstrip/2
    • trim_trailing/1 to rstrip/2

    These functions now support a string argument.

Fixed

  • Fix warnings for the upcoming Elixir v1.16.

  • Fix Explorer.Series.abs/1 type specs.

  • Allow comparison of strings with categories.

  • Fix Explorer.Series.is_nan/1 inside the context of Explorer.Query.
    The NIF function was not being exported.

Pull requests

New Contributors

Full Diff: v0.6.1...v0.7.0
Changelog: https://github.com/elixir-explorer/explorer/blob/main/CHANGELOG.md

SHA256 checksums

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Contributors

josevalim, pgeraghty, and 11 other contributors
Assets 12

v0.6.1

06 Jul 23:42
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v0.6.1
af224ed
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v0.6.1

Pull requests

  • Fix summarise for lazy frames without groups by @philss in #643

Full Changelog: v0.6.0...v0.6.1

SHA256 checksums

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Contributors

philss
Assets 22

v0.6.0

05 Jul 23:37
@github-actions github-actions
v0.6.0
a32799e
This commit was signed with the committer’s verified signature.
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v0.6.0

This version is exciting because it has the addition of a bunch of functions, thanks to the contributors! 💜
Shout out to those who made fixes and docs improvements as well!

Added

  • Add support for OTP 26 and Elixir 1.15.

  • Allow Explorer.DataFrame.summarise/2 to work without groups.
    The aggregations can work considering the entire dataframe.

  • Add the following series functions: product/1, cummulative_product/1, abs/1,
    skew/2, window_standard_deviation/3, rank/2, year/1, mounth/1, day/1,
    hour/1, minute/1, second/1, strptime/2, strftime/2, argmin/1, argmax/1,
    cut/3, qcut/3, correlation/3, covariance/2 and clip/3.

    They cover a lot in terms of functionality, so please check the Explorer.Series
    docs for further details.

  • Add Explorer.DataFrame.nil_count/1 that counts the number of nil elements in each
    column.

  • Add Explorer.DataFrame.frequencies/2 that creates a new dataframe with unique rows
    and the frequencies of each.

  • Add Explorer.DataFrame.relocate/3 that enables changing order of columns from a df.

  • Add precompiled NIFs for FreeBSD.

  • Support scalar values in the on_true and on_false arguments of Explore.Series.select/3.

Fixed

  • Fix Series.day_of_week/1 and Series.round/2 for operations using a lazy frame.

  • Fix upcasted date to datetime for literal expressions. It allows to use scalar dates
    in expressions like this: DF.mutate(a: ~D[2023-01-01]). This also fixes the support
    for naive datetimes.

  • Improve error messages returned from the NIF to be always strings. Now we add more
    context to the string returned, instead of having {:context, error_message}.

  • Fix the :infer_schema_length option of Explorer.DataFrame.from_csv/2 when passing nil.
    Now it's possible to take into account the entire file to infer the schema.

Deprecated

  • Deprecate Explorer.Series.to_date/1 and Explorer.Series.to_time/1 in favor of
    using Explorer.Series.cast(s, :date) and Explorer.Series.cast(s, :time) respectively.

Pull requests

New Contributors

Full Changelog: v0.5.7...v0.6.0

SHA256 checksums

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Contributors

wojtekmach, philss, and 8 other contributors
Assets 22

v0.5.7

10 May 21:50
@philss philss
v0.5.7
1db7146
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v0.5.7

Changes

Added

  • Allow Explorer.Series.select/3 to receive series of size 1 in both sides.

  • Add trigonometric functions sin/1, cos/1, tan/1, asin/1, acos/1 and
    atan/1 to Explorer.Series.

  • Add Explorer.DataFrame.to_rows_stream/2 function. This is useful to traverse
    dataframes with large series, but is not recommended since it can be an expensive
    operation.

  • Add LazyFrame version of Explorer.DataFrame.to_ipc/3.

  • Add options to control streaming when writing lazy dataframes. Now users can
    toggle streaming for the to_ipc/3 and to_parquet/3 functions.

  • Add Explorer.DataFrame.from_ipc_stream/2 lazy, but using the eager implementation
    underneath.

  • Add option to control the end of line (EOF) char when reading CSV files.
    We call this new option :eol_delimiter, and it's available for the from_csv/2
    and load_csv/2 functions in the Explorer.DataFrame module.

  • Allow Explorer.DataFrame.pivot_wider/4 to use category fields.

Fixed

  • Fix nif_not_loaded error when Explorer.Series.ewm_mean/2 is called from query.

  • Type check arguments for boolean series operations, only allowing series of
    the boolean dtype.

  • Do not use ../0 in order to keep compatible with Elixir 1.13

Removed

  • Temporarely remove support for ARM 32 bits computers in the precompilation
    workflow.

Pull requests

  • Fix nif_not_loaded error when Series.ewm_mean/2 is called from query by @sasikumar87 in #557
  • Allow Series.select/3 on_true and on_false both to receive series of size 1 by @sasikumar87 in #556
  • Add Trigonometric functions Series.sin/1, Series.cos/1 and Series.tan/1 by @sasikumar87 in #558
  • Add Trigonometric functions Series.asin/1, Series.acos/1 and Series.atan/1 by @sasikumar87 in #560
  • sin/1, cos/1 and tan/1 doesn't support integer dtype by @sasikumar87 in #561
  • Type check arguments for boolean series operations by @sasikumar87 in #564
  • Update Polars to v0.28 by @philss in #570
  • add Explorer.DataFrame.to_rows_stream method by @mlineen in #571
  • Fix typo/phrasing in Series documentation by @pgeraghty in #574
  • Add LazyFrame version of to_ipc/3 (#499) by @treebee in #579
  • Update rustler to v0.28.0 by @philss in #580
  • Add options to control streaming when writing lazy DF by @philss in #582
  • Implement from_ipc_stream/2 lazy, but using eager backend by @philss in #583
  • End of Line For CSV Loading/Parsing by @jeregrine in #578
  • add_rust_version_to_readme by @dkuku in #587
  • Allow pivot_wider to use category fields by @dkuku in #586
  • Add change log since version 0.5.6 by @philss in #592
  • Disable precompilation for ARM 32 bits by @philss in #593
  • Release v0.5.7 by @philss in #594

New Contributors

Full Changelog: v0.5.6...v0.5.7
Official Changelog: https://github.com/elixir-nx/explorer/blob/main/CHANGELOG.md

SHA256 checksums

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Contributors

pgeraghty, jeregrine, and 5 other contributors
Assets 20

v0.5.6

24 Mar 21:04
@philss philss
v0.5.6
fe55e11
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philss Philip Sampaio
GPG key ID: 13B353009A865C2C
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v0.5.6

Added

  • Add the following functions to the Explorer.Series module: log/1, log/2 and exp/1. They compute the logarithm and exponential of a series.

Fixed

  • Allow Explorer.Series.select/3 to receive series of size 1 for both the on_true and on_false arguments.

  • Fix the encoding of special float values that may return from some series functions. This is going to encode the atoms for NaN and infinity values.

Pull requests

  • Allow Series.select/3 on_true or on_false to receive series of size 1 by @sasikumar87 in #547
  • Add log/2 and exponential/1 to Series by @philss in #549
  • Fix encoding of special float values for Series by @philss in #551
  • Prepare release of v0.5.6 by @philss in #552

Full Changelog: v0.5.5...v0.5.6
Official Changelog: https://hexdocs.pm/explorer/changelog.html

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Contributors

philss and sasikumar87
Assets 22