change contra of colormap
Synopsis
newColormap=econtra(colormap,contrast[,colorChannel])
Parameter(s)
colormap :
color table
contrast :
-200 to 200 per cent
colorChannel :
vector of Channel; 1=red, 2=green, 3=blue
e.g. [1 3] = Channel red and blue
default=[1 2 3]
newColormap :
changed color table