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I have three columns in an excel file and i want MATLAB to find the maximum value from all columns and return the column where the maximum is found. How to do this?

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Debbie Oomen
Debbie Oomen 2017-10-6
评论： KL 2017-10-8
I have three columns in an excel file and i want MATLAB to find the maximum value from all columns and return the column where the maximum is found. How to do this?

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回答（2 个）

Cam Salzberger
Cam Salzberger 2017-10-6
Hello Debbie,
There are a couple of ways you could do this. One is to use max to find the maximum of each column, and then max on that to find which column:
maxOfCols = max(A);
[~, colIdxOfMax] = max(maxOfCols);
Another would be to just find the linear index of the maximum, then translate out the column index from that:
[~, linIdxOfMax] = max(A(:));
[~, colIdxOfMax] = ind2sub(size(A), linIdxOfMax);
-Cam
KL
KL 2017-10-6
data = xlsread('yourfile.xls');
maxVal = max(data);
[mmaxVal col_no] = max(maxVal)

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