[Matplotlib-users] 2D array plot picking explicit values to colour and legend

[Mathew T. <mat...@ed...>]

Dear matplotlib-users,

I have a spatial data set that has coded values for each cell, which are 
limited to just a few numbers, ie -8888, 0, 100, and 9999. I would like 
to display this data with a plot similar to pcolor, but I don't want a 
colorbar, I want a legend showing the colors for each code and an 
explanation for what each code represents. I would like to be able to 
choose a subset of the codes as well, for example just plotting the 0 
and 100 codes and ignoring the -8888 and 9999 codes.

I have seen a few similar attempts that used BoundaryNorm, but I don't 
want to show a range of values I just want to set colors for a few 
explicit values. Those examples also had a colorbar and, as I said, I 
would prefer a legend.

Can anyone offer any tips?

Thanks

Mat

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