problem in find correspond values in two matrixes

Question

Mani Ahmadian 2014-10-17

回答： Guillaume 2014-10-17

I have two matrixes, A and B. These are the same size, 7*7.

I checked matrix A for values are between min and max values by this code:

[RowIndex,ColIndex] = find(A>Min & A<=Max);

And then select each correspond member of matrix B by:

temp=B(RowIndex,ColIndex);

But it returns a wrong matrix (for example 20*20).

Please help me to do that.

Thanks a lot.

Mani

Answer 1

Guillaume 2014-10-17

Yes you can't do that.

B([1 5 6 1], [4 3 7 8])

would return a 4x4 matrix consisting of row 1, 5, 6 and 1 again of B and column 4, 3, 7 and 8 of B.

To do what you want, simply use linear indexing:

index = find(A>Min & A<=Max);
temp = B(index);