Find elements from a submatrix in the main 3D matrix
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I have a matrix M = 10x5. 10 representing the number of users and 5 the values for each user. This is taken out of the bigger matrix A = 161x161x10. 10 again being the same number of users as in the M matrix. The values from M are in A.
My main goal is to find the indexes (or ROW,COL) from the values from matrix M in matrix A. The problem is that because in M , I have duplicate values I can't find use the FIND function. Based on my research I did not found something helpful.
Do you think is possible to do this? Thank you!