Linear index to matrix index

[MohammadrezaMC2]

Hello
I have a set of linear indices for a matrix which needs to be set to zero, how can I convert them to matrix indices in math numerics
is there a function in math numerics that can do that?

[cdrnet]

Linear indexing as e.g. in Matlab is very storage format specific. But it so happens that dense matrices in Numerics are organized the same way in column-major. So, if the matrix is dense, then m.AsColumnMajorArray() will return the internal array (directly, not a copy) which you can then access in this linear way.