MATLAB: How to count values in a matrix

MATLABvolume fraction

I have a matrix with size 1887×2048, for each element is a number from 0 to 255. I want to find out how many elements is bigger than 100 and how many smaller than 100 (aka volume fraction)

Best Answer

 volumefraction = mean2(YourMatrix>100);

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MATLAB: How to find out how many columns have more than 50 elements which are greater than 1

I currently have a matrix that's 100*100 size, and I wish to work out how many columns have more than 50 elements which are greater than 1

Lets say matrix 100*100 named as data

idx=data>1;
result=sum(idx);
data2=result>50;
fprintf('The column number is: %d',sum(data2(:)));

MATLAB: Count

G = randi(3, 45, 2);
I = randi(3, 45, 2);
sum(all(G == I, 2))

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MATLAB: How to find out how many columns have more than 50 elements which are greater than 1

MATLAB: Count

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