Hi,

i defined the colors as follow for image function in R,
mycola=c("#00FF00","#0DF200","#1BE400","#28D700","#36C900","#43BC00","#51AE00","#5EA100","#6B9400","#798600","#867900","#946B00","#A15E00","#AE5100","#BC4300","#C93600","#D72800","#E41B00","#F20D00","#FF0000")

So when i use this color set to plot different data matrix which have
different max and min value, the same color in different figure represents
different value.
for example ,i have two data matrix,one with min= -2,max=3.5;the second with
min= -3,max=2.5;And i want to fix -3 to be the most blue(#00FF00),3 the most
red(#FF0000),what can i do ?
That is vales less than -3 will be plotted as -3, so for vales greater than
3.


Any suggestion?
Thanks in advance.

Jiantao Shi

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