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A problem in using imhist to display histogram of indexed image

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Iman Ansari
Iman Ansari on 28 Jan 2016
First i convert the image to an indexed image, and use only 5 colors to show what is my problem.
clear
img = imread('peppers.png');
[x,map] = rgb2ind(img,5);
figure;
imhist(x,map)
the colorbar doesn't match with the histogarm bars, this is my colormap:
map =
0.2784 0.1373 0.2353
0.7608 0.1686 0.1373
0.8902 0.7255 0.6353
0.4275 0.3765 0.2235
0.8471 0.5569 0.1020
the first one isn't white, It seems that the colorbar is shifted by one.

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