R-alpha: Eigenvalue Computation Query

[Paul Gilbert]

Ross

>Should I drop this special code and always compute both eigenvalues
>and eigenvectors?  This would substantially reduce code size, but might
>increase computational cost in the case where only eigenvalues are
>needed.

I often need the eigenvalues only, but in my experience the main causes for
slowness is when I start using more memory than is physically available. (My
machine starts sounding like it does when I run S.) I would guess that
reducing code size may be more valuable than the specialized code.

Paul Gilbert

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