how to remove a bar from histogram which drawn using 'hist' function?

hi can anyone help me to remove zeros bar in histogram this is a part of the code . i'm new in matlab so pleas help me

 [hCount, hValues] = hist(h(:), 6); 
 [sCount, sValues] = hist(s(:), 6); 
 [vCount, vValues] = hist(v(:), 6); 

 % Plot histograms.
 subplot(3, 4, 6);
 bar(hValues, hCount);
 title('Hue Histogram');
 subplot(3, 4, 7);
 bar(sValues, sCount);
 title('Saturation Histogram');
 subplot(3, 4, 8);
 bar(vValues, vCount);
 title('Value Histogram');

Answer 1

[Tom Lane]

If you want to omit zeros from the bar calculations:

hist(h(h~=0), 6)

Depending on your data, this may omit the bar that contains zero.

If you want to omit bars that have zero height, well, when I try this I don't see anything at those spots. Maybe you could explain some more.

Answer 2

[Image Analyst]

Sometimes your counts have one bar that you want to get rid of, for example the bar for the v bin representing a v value of 0 is so tall that when you display it you can't see the other bars because they're so short. To do that, I typically just set that counts value to zero before plotting.

[vCount, vValues] = hist(v(:), 6); 
% Let's say the first bin is way, way taller than the other bins
% so you can't see the shape of the histogram of the other bins.
% You can set the bin = 0
vCount(1) = 0;
% Then plot it
bar(vValues, vCount, 'BarWidth', 1.0);

Alternatively you can take the log of the counts to compress the tall bins:

bar(vValues, log(vCount), 'BarWidth', 1.0);