[R] Relation of BLAS and LAPACK

[Tomáš Greif]

How BLAS and LAPACK are related, does R need both?

I am trying to understsand different BLAS options in R and I am quite not
sure if LAPACK is part of BLAS, or separate library or something else.
Based on http://www.netlib.org/lapack/ it looks like LAPACK is some kind of
BLAS extension ("LAPACK routines are written so that as much as possible of
the computation is performed by calls to the Basic Linear Algebra
Subprograms (BLAS)").

Tomas

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