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Ublas : |
From: Prasad Ramanan (prasad.ramanan_at_[hidden])
Date: 2007-05-01 15:48:45
Hi Gunter,
Thanks again for your help - I'll try the CVS head. And regarding the
issue that I am having with assertions; I think it has something to do
with an unfortunate mix of debug and release mode libraries that I
have compiled together in my project under Visual Studio 7.0, which I
am currently sorting out. Thanks again for your help.
Take care,
Prasad
On 5/1/07, Gunter Winkler <guwi17_at_[hidden]> wrote:
> Am Montag, 30. April 2007 18:05 schrieb Prasad Ramanan:
> > ublas::permutation_matrix<double> P(n);
>
> this should be a permutation_matrix< int >
>
> > I have since upgraded to boost 1-33.1 (downloaded from
> > SourceForge.net), but I still require the includes suggested by
> > Gunter in order to get the code to compile, although he had suggested
> > that I would no longer need them after upgrading to 1-33.
>
> Maybe the change was after the release of 1.33. The current CVS-Head
> compiles without the extra includes.
>
> > Once the
> > code is compiled, I get a runtime error caused by the lu_substitute
> > method while running:
> >
> > Assertion failed in file
> > c:\boost\include\boost-1_33_1\boost/numeric/ublas/lu.hpp at line 271:
> > detail::expression_type_check (prod
> > (triangular_adaptor<const_matrix_type, upper> (m), e), cv2)
>
> This happens typically when the matrix is ill conditioned or nearly
> singular. Please look at
> http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Effective_UBLAS
> for a description of the TYPE_CHECK and TYPE_CHECK_EPSILON macros. Try
> this:
>
> #define BOOST_UBLAS_TYPE_CHECK_EPSILON 1.0
> (in front of ublas/config.hpp)
>
> mfg
> Gunter
>
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