[Help-gsl] Multiple views on same matrix

[Michael Braun]

Hello, again.  I apologize for two questions on the same day, but I think
this question might be more likely to help me debug my code than the last.

The question is, "are there any issues involved in having two submatrix
views on the same matrix?"

For example, is this a legal representation:

gsl_matrix * A  = gsl_matrix_alloc(3,6);
gsl_matrix_view V1 = gsl_matrix_submatrix(A,0,0,2,6);
gsl_matrix_view V2 = gsl_matrix_submatrix(A,0,0,2,4); // the views overlap
gsl_matrix_memcpy(&V1.matrix,X);  / X is a 2x6 matrix

And then, could I set, get and memcpy to &V1.matrix and &V2.matrix freely?
Or, once I create V2, does V1 disappear?

In the archives, there was a post on a similar topic from 2004, but
unfortunately, there were no responses.

Thanks again for your help.

Michael




Michael Braun
Assistant Professor of Marketing
MIT Sloan School of Management
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