Package index
Absolute palettes
Colour palettes matched to real data values on a fixed scale, for sea surface temperature, chlorophyll-a, sea ice concentration, and bathymetry. Each works in three modes, n colours with pal(n), colours for data values with pal(data), and the full palette with pal(palette = TRUE).
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sst_pal()sstPal() - SST colours
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chl_pal()chlPal() - Ocean colour colours for chlorophyll-a.
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ice_pal()icePal() - Sea ice colours
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bathy_deep_pal()bathyDeepPal() - Bathymetry
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dirty_pal() - Bathymetry palette, absolute for global use
Data-relative colours
Map values to colours by the range of the data itself, or by absolute date-time.
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d_pal()data_pal() - Colours for data values
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mk_timePal() - Time-indexed colour.
Image colour mapping
Convert numeric data to hex colours the way image() does, or convert matrices and multi-band arrays to hex colour matrices ready for rasterImage(), textures, or export.
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image_hex() - Convert image data to a matrix of hex colours
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image_pal()image_raster()image_stars() - Map data values to colours
Stretching
Rescale data to the unit interval ahead of colour mapping, linear quantile clip, log, square root, and histogram equalisation.
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stretch_linear()stretch_log()stretch_sqrt()stretch_histeq() - Stretch numeric values to [0, 1]
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col2hex() - Colour to hex conversion.
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palr-packagepalr - palr