How to freeze a particular column of matrix in a for loop?

Hi,

I am updating a matrix in a for loop. I want to freeze a particular column of this matrix, say column j, and update the rest of the matrix.

Any help would really be appreciated. Thanks.

[Geoff Hayes]

Mohammad - what is your code for updating this matrix? Could you just save the column, then update the matrix, then restore the column?

[Mohammad]

Yes, that's exactly what I am doing now. I would have thought that maybe there exists an easier approach.

[Geoff Hayes]

I guess it all depends on how you are updating your matrix. Can you post a short example?