How do i find the location by using max and find function?

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Samantha Pham 2020-9-15

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评论： Samantha Pham 2020-9-15

采纳的回答： Image Analyst

I have a Matrix

K = [Mon Tue Wed Thu Fri Sat Sun]

L = [1 9 6 5 4 7 3 ;

3 5 6 4 1 8 2]

M = [K; L]

Finding the location that contain the maximum value. For example: 9 is the maximum value in this case and the column that contains it is Tue. So, how do we indicate the name of the column contain the maximum value?

Thank you!

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Answer 1

Image Analyst 2020-9-15

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Don't use max() - it only gives the location of the first global max, not all of them (in the case the max occurs in more than one location). Try this

maxValue = max(yourMatrix);
[rows, columns] = find(yourMatrix == maxValue)

Where yourMatrix is L or Ice or whatever you want.

If you want local maxima, use imregionalmax().

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Samantha Pham 2020-9-15

It works! but one small problem, how do i transfer those number into given name.

i have third column and tenth row, the value will be day 25 and location WSW324.

Thank you very much!!!

Samantha Pham 2020-9-15

Nvm, I figure it out. Thank you!

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Answer 2

madhan ravi 2020-9-15

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doc max % second output , does what you need

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madhan ravi 2020-9-15

“How do i correct this?”

If it were me I would provide a valid example so that the person answering the question won’t have any trouble. Did you paste the K in command window and see what MATLAB has to say?

Samantha Pham 2020-9-15

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So this is the actual problem i want to ask, i was provided with these three table. My task is to find the maximum value in the Ice table, after that indicate where the maximum number attaches with which location and that number was recorded on what day. The last four sentences are the result of how it should be.

This is what i have so far...

Thank you for being patient!

    [r,~] = size(Ice);
    [~,c] = size(Ice);
    TotalMM = r.*c;
    OAveMM = mean(Ice,"all");
    OMaxMM = max(Ice(:));

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