Version 0.7.0

New features:

• Improved computational performance of optimal interpolation functions by around 10%
• Added mask_threshold_downscale_quantile to compute quantiles and downscale in one go (thanks @LonnekevB)
• Added points-to-points gridding methods
• Added vector version of gridpp::interpolate
• Added RandomChoice statistic. For functions that compute statistics on vectors, this allows you to randomly pick an element in the vector.
• Added neighbourhood_score function that computes a verification score for all observations in a neighbourhood
• Added gridding and gridding_nearest methods that takes points as inputs and points as output
• Better handling of repeated x-values in apply_curve
• Raise exception if constructing Grid or Points objects with undefined (e.g. NaN) coordinates
• Pre-compiled linux packages for Python 3.7 to 3.11 available

Bug fixes:

• Fixed bilinear interpolation for unusual cases (polar stereographic case covering the north pole; thanks @trygveasp)
• Fixed bug in structure functions across dateline (thanks @joewkr)
• Fixed optional_interpolation_full for points (thanks Christoph Herbert and Ewan Pinnington)

Version 0.6.1

Fixed bug in command-line client when using log transform in -d gradient

Version 0.6.0

• optimal_interpolation_full that returns analysis variance
• Point-to-point variant of nearest neighbour and simple gradient downscaling
• allow_extrapolation option in OI functions
• local_distribution_correction method
• doping_square and doping_circle methods
• neighbourhood_search function
• allow_extrapolation boolean to optional_interpolation function
• full_gradient to downscale with spatially varying gradients
• calc_gradient to compute neighbourhood gradient
• grid-to-grid and point-to-point variants of distance and count functions
• sea level pressure function
• window function to compute moving window statistics for timeseries
• Gamma transformation
• Calibration with spatially varying calibration curve
• Speed improvement and bux fixes in bilinear function
• Faster implementation of nearest neighbour interpolation for multiple timesteps
• New way of specifying curve-based correction

Version 0.5.2

• Bug fix to ensemble version of neighbourhood_quantile_fast for quantiles that are varying in space

Version 0.5.1

• Bug fix to neighbourhood_quantile_fast for quantiles that are varying in space

Version 0.5.0

• API changes:
  • Support for cartesian x/y coordinates (instead of just lat/lon)
  • A bilinear interpolator that works on all grid rotations
  • Easy cross-validation setup for optimal interpolation
  • Functions for computing distance to nearest points on grid
  • Functions for computing number of nearby points on grid
  • Function for computing neighbourhood quantiles with spatially varying quantiles
  • Function for gridding observations
  • Function for filling in missing values
  • Experimental method for optimizing a metric (metric_optimizer_curve)

v0.4.2

• General changes:
  • Changed the licence from GPL-2 to LGPL-3
  • Exposed an API to a library of core gridpp functionality
• Command-line changes:
  • Added window= to -c deaccumulate

v0.3.1

• New features:
  Variables are referenced by their NetCDF variable name
  • Adds cmake compilation
  • Adds -c oi to perform optimal interpolation
  • Gradient downscaler can use temperature at model levels (instead of T2m)
    when computing gradient
  • Adds coastal regression in -d gradient
  • Adds -c coastal, a bias-correction scheme that weights land and sea
    tempatures from a neighbourhood
  • Variable names can be overridden by passing in a variable map file
• Backwards-incompatible changes:
  • Gradient downscaler options are different. Use -d gradientOld to get
    previous behaviour.
  • Parameter text files must contain header
  • Parameter files are specified differently: -p type=
  • The command-line interface to this version has changed significantly.
  • Names as they appear in the file are used to identify variables. I.e.
    use -v air_temperture_2m instead of -v T.
  • -c diagnose replaced by -c diagnoseHumidity and -c diagnoseWind

v0.2.10

• Adds -d bilinear
• Adds bilinear interpolation to -d gradient

v0.2.9

• Adds -c diagnose for dewpoint temperature and RH
• Diagnoses altitude from geopotential height for EC files
• Fixes bug in Kalman Filter formulation