| Re: [eigen] Assertion failure doing matA.col(??).noalias() = matB.row(??) |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Assertion failure doing matA.col(??).noalias() = matB.row(??)
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Thu, 2 Sep 2010 19:16:49 +0200
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done (with the respective unit tests ;) )
gael
On Thu, Sep 2, 2010 at 6:53 PM, Gael Guennebaud
<gael.guennebaud@xxxxxxxxx> wrote:
> ok thank you for spotting it. fix and unit test within a few minutes....
>
>
> gael
>
> On Thu, Sep 2, 2010 at 6:39 PM, Eamon Nerbonne <eamon.nerbonne@xxxxxxxxx> wrote:
>> The following code fails with an assertion (on g++ & MSC)
>>
>> MatrixXd matA, matB;
>>
>> matA = MatrixXd::Random(12,15);
>> matB.resize(matA.cols(),matA.rows());
>> for(ptrdiff_t i=0;i<matA.rows();++i)
>> matB.col(i).noalias() = matA.row(i); //<-- fails here!
>> assert(matB.isApprox(matA.transpose());
>>
>>
>> Without the .noalias, it succeeds. Is this by design? It's confusing, at
>> least...
>>
>> --eamon@xxxxxxxxxxxx - Tel#:+31-6-15142163
>>
>