MATLAB: How to change the line color in the output of imhist

Question

imhist provides the output in blue lines;i want to change it into say either red or green

Answer 1

For precise control, plot it yourself with bar() and then set the 'EdgeColor' and 'FaceColor' properties in the bar() function:

img = imread('moon.tif');
[counts, grayLevels] = imhist(img, 64);
bar(grayLevels, counts, 'EdgeColor', 'r', 'FaceColor', 'c', 'BarWidth', 0.95);

Makes cyan bars with red outlines.