[R] colour palette for positive/negative range

[Frank Schwach]

Hi,

I'm plotting a heatmap with values ranging from -10 to +10 and I would
like the negative values to show up in shades of blue and the positive
ones in shadea of red. Basically, I want exactly what the RColorBrewer
palette RdBu does but with more of a gradual change (the RdBu can only
give me 11 distinct colours). Any suggestions?

Thanks!

Frank




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