How can I which value that be used to calculate a function

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Tianze Li
Tianze Li 2019-5-14
评论： Fangjun Jiang 2019-5-17
In this casue, I difine a range for x and y, and then calculated the min value of L, but how do i find which x vaule and y value to calculate the min L? Many thanks!!!!!

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Fangjun Jiang
Fangjun Jiang 2019-5-14
编辑：Fangjun Jiang 2019-5-14
You need to run min() twice
A=magic(5);
[MinInCol,RowIndex]=min(A);
[MinValue,ColIndex]=min(MinInCol);
Position=[RowIndex(ColIndex),ColIndex];
or better
[MinValue,Index]=min(A(:));
[Ix,Iy]=ind2sub(size(A),Index)
  2 个评论
Tianze Li
Tianze Li 2019-5-17
Yes. It did show the row and coloum for both x and y. But how can i display the value from that row and coloum instead of to find them from the array
Fangjun Jiang
Fangjun Jiang 2019-5-17
Not clear what you mean. Maybe in your example, you are looking for x(Ix), y(Iy)?

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更多回答（1 个）

Steven Lord
Steven Lord 2019-5-14
Since you indicate that you're using release R2019a, call min with the 'linear' option and two output arguments. This will give you the linear index of the minimum value, and you can use that index into x and y.

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