[petsc-users] forming a matrix from a set of vectors

[Jed Brown]

Nicolas Pozin <nicolas.pozin at inria.fr> writes:
> Given a set of vectors V1, V2,...,Vn, is there an efficient way to form the dense matrix [V1 V2 ... Vn]? 

What do you want to do with that matrix?  The vector representation is
pretty flexible and the memory semantics are similar unless you store
the dense matrix row-aligned (not the default).
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