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how to find maximum value of 2nd column of matrix 22x2?

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Rasha
Rasha 2013-12-25
评论： Rasha 2013-12-25
I have the next matrix A I want to find maximum value of 2nd column of it,
but the matlab didn't accept the step!!!
A = [1 32143;2 1;3 98998;4 45321;5 96856;6 32143;7 9991;8 4343;9 34454;10 9991;11 9991;12 654;13 6798];
[n m] = size(A);
min = min(min(A));
max = max(max(A));
s = 1;
for k = min:max
t = 0;
for i = 1:n
for j = 1:m
if A(i,j) == k
t = t+1;
end
end
end
N(s,:) = [k t];
if t == 0
N(s,:) = N(s-1,:);
s = s-1;
end
s = s+1;
end
[num index] = max(N);
thanks

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2013-12-25
编辑：Azzi Abdelmalek 2013-12-25
[num idx]=max(A(:,2))
  3 个评论
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Azzi Abdelmalek
Azzi Abdelmalek 2013-12-25
编辑：Azzi Abdelmalek 2013-12-25
You have used max as a variable
max = max(max(A));
Then used it as a function, Matlab does not recognize it as a function
[num index] = max(N);
Do not use function names as variables; use for example
max_value = max(max(A));
%OR
max_value = max(A(:));

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