MATLAB: What mean ,hist word in matlab

MATLAB

what mean ,hist word in matlab ?

Best Answer

It a frequency histogram

X = randn(1000,1);
hist(X)

It "bins" the input data and returns the number of data values that value in each bin.

You can get the actual counts and bin center with the optional output arguments:

 [counts,centers] = hist(X);

Related Solutions

MATLAB: Hist problem

unique(out) gives 25, that means you ask for 25 bins, you can see it because you get counts and values with 25 elements.

do it like this:

[counts,values] =  hist(transpose(out),numel(unique(out)));

MATLAB: For texture classification i have taken lbp as a feature..after applying lbp i have taken histogram..how to normalise the bins of histogram..and what is meant by normalise bins of histogram

Normalization would mean that you either divide by the max value of the counts, or that you divide by the sum of all the counts.

[pixelCounts grayLevels] = imhist(lbpImage, 256);
normalizedHist1 = pixelCounts / max(pixelCounts(:));
normalizedHist2 = pixelCounts / sum(pixelCounts(:));

It means that either the max value of any count will be 1.0, or that the sum of all counts would now be 1.0, depending on which method you use.

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Related Solutions

MATLAB: Hist problem

MATLAB: For texture classification i have taken lbp as a feature..after applying lbp i have taken histogram..how to normalise the bins of histogram..and what is meant by normalise bins of histogram

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