[R] RColorBrewer Package Color index

[W. Katy]

Hi everyone, 

Can anyone kindly help me with the interpretation of colors in the 
RColorBrewer Package (brewer.pal) ? 

For example, in brewer.pal command, when picking up the "RdBu" palette, 
does red means larger or smaller value?

I am new to this fantastic program, and I have searched up and down, no 
clue :(  I will really appreciate your time if you can kindly give me a 
hand.  

Thank you so much for your attention! 

Best, 
Katy

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