calculating the percentage and displaying

I have a 256*256 matrix consisting of ones and two's for example i have a 4x4matrix

A=[1 2 2 1

   1 2 1 1

   2 2 2 1

   1 1 1 1 ]

in the A matrix i want to calculate the percentage of ones and two's

i have 10 number of 1's (10/16*100) so i want to display as

62.5% same_value

37.5%others

please help

Answer 1

[Image Analyst]

Try this:

A=[1 2 2 1
   1 2 1 1
   2 2 2 1
   1 1 1 1 ]
numberOfBins = max(A(:));
countsPercentage = 100 * hist(A(:), numberOfBins) / numel(A)

In the command window:

A =
     1     2     2     1
     1     2     1     1
     2     2     2     1
     1     1     1     1
countsPercentage =
                      62.5                      37.5

[kash]

ok thanks but i need as

62.5% same_value

37.5%others

i need to display same_values near 62.5% and others near 37.5%

[Image Analyst]

fprintf('%.1f%%same_value\n\n', countsPercentage(1));
fprintf('%.1f%%others\n\n', countsPercentage(2));

fprintf('same_values near %.1f%%and others near %.1f%%\n\n', countsPercentage(1), countsPercentage(2));

[kash]

i get as

62.5% same_value37.5%otherssame_values near 62.5% and others near 62.5%>> why do i get extra values as

same_values near 62.5% and others near 62.5%>>

[Image Analyst]

I printed out to the command window exactly what you said you need: "i need as...." and "i need to display...."

I edited the above code in the above comment to add the \n to put them on separate lines. Try again.

[nor azam]

Hi Image Analyst, what if i want to print the value along with the image. Means that i used imshow to show the image and i want to print the percentage on the image. Is there any other way? please help me.

Here is my code after binarize.

BW2 = imbinarize(rightHalf)
figure;
imshowpair(rightHalf,BW2,'montage')
percentageBlackRight=(1-nnz(rightHalf)/numel(rightHalf))*100