bronx.graphics.colormapping

Custom colormaps reading and scaling.

Functions

bronx.graphics.colormapping.add_cmap(cmap, sourcefile)

Reads and registers the given colormap in matplotlib.

Parameters:

• cmap – name of the colormap, to be registered under and used then

• sourcefile – opened file-like object to read the colormap in.

bronx.graphics.colormapping.get_norm4colorscale(scaling, max_val=None)

Creates a matplotlib.colors.BoundaryNorm object tuned for scaled colormaps, i.e. discrete, irregular colorshades.

Parameters:

• scaling – the values determining changes of colors

• max_val – an additional maximum value to replace the upper bound if this value is included between the last two upper values.

Returns:

a tuple (norm, scaling), scaling being eventually modified according to max_val

bronx.graphics.colormapping.read_cmap(sourcefile)

Read and creates a custom Colormap from a set of RGB colors in a file with the following formating:

r1,g1,b1;\n
r2,g2,b2;\n
...\n
rn,gn,bn

each value being comprised between 0 and 255, or 0 and 1.

Parameters:

sourcefile – opened file-like object to read colormap from.