[SciPy-dev] linalg.flapack strange argument in *gesdd

Nils Wagner nwagner at mecha.uni-stuttgart.de
Wed May 18 03:24:44 CDT 2005


Hi all,

A help (linalg.flpack) yields

This module 'flapack' is auto-generated with f2py (version:2.46.243_1985)

u,s,vt,info = 
sgesdd(a,compute_uv=1,lwork=(compute_uv?4*minmn*minmn+MAX(m,n)+9*minmn:MAX(14*minmn+4,10*minmn+2+25*(25+8))+MAX(m,n)),overwrite_a=0)
      u,s,vt,info = 
dgesdd(a,compute_uv=1,lwork=(compute_uv?4*minmn*minmn+MAX(m,n)+9*minmn:MAX(14*minmn+4,10*minmn+2+25*(25+8))+MAX(m,n)),overwrite_a=0)
      u,s,vt,info = 
cgesdd(a,compute_uv=1,lwork=(compute_uv?2*minmn*minmn+MAX(m,n)+2*minmn:2*minmn+MAX(m,n)),overwrite_a=0)
      u,s,vt,info = 
zgesdd(a,compute_uv=1,lwork=(compute_uv?2*minmn*minmn+MAX(m,n)+2*minmn:2*minmn+MAX(m,n)),overwrite_a=0)

What is the meaning of compute_uv?4*minmn*minmn ?

Any idea ?

Nils




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