How to find maximum value among R,G,B channels in the same indices?

I want to find the maximum of R,G,B in the same indices But it shows some error with max function.Please help me out

[aswathy pavithran]

A=[R,G,B] B=max[A]; C=min[A];

Answer 1

[ES]

A = imread('thank-you.jpg');
[iRows, iColumns, ~] = size(A);
for iLoop1=1:iRows
    for iLoop2=1:iColumns
        B(iLoop1, iLoop2) = max(A(iLoop1, iLoop2, :));
    end
end

[lakshmi prabha]

Thank you....

Answer 2

[ES]

I dont know any direct way, but you can run a loop on the length and breadth of the image matrix to find the max of R, G, B at each pixel.

[lakshmi prabha]

l=size(A); for i=1:l(1) for j=1:l(2) a=A(i,j,1); b=A(i,j,2); c=A(i,j,3); C1=max(max(a,b),c); end end This is the code I used But it didn't work.Can you rectify it

[aswathy pavithran]

d=[a,b,c]; e=max(d);