[ADOL-C] What does it means "Compressed sparse structures will not be available / Only sparsity patterns can be computed" ?

Andrea Walther andrea.walther at uni-paderborn.de
Thu Aug 16 10:31:28 EDT 2012


if you enable the sparsity option in ADOL-C
without providing ColPack then

* you can determine the sparsity pattern of the
  derivative matrices

* but you can not comnpute the sparse derivative matrices
  because this feature relies on the compression and
  decompression of these matrices and Colpack
  is required for that.

If the sparsity pattern suffices then you can use
the sparsity option in ADOL-C without installing ColPack.

Best regards


Prof. Dr. Andrea Walther
Lehrstuhl fuer Mathematik und ihre Anwendungen
Institut fuer Mathematik
Universitaet Paderborn
Warburger Str. 100
33098 Paderborn

Email: andrea.walther at uni-paderborn.de
Phone: ++49 5251 602721
Fax:   ++49 5251 603728


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