[eigen] Pass column by reference

[Carlos Becker <carlosbecker@xxxxxxxxx>]

Hi everyone, I was wondering if it is possible to do something like this:

void  putSomethingInVector( VectorXf &data ) { work with data and modify it; }

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MatrixXf  myMatrix(100,100);

putSomethingInVector( myMatrix.col(4) );

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I know it is not possible like that, but is there any way? or .col() returns a read-only reference? I was looking for something like colRef() but no luck

Thanks!

Carlos