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Bug 344

Summary: Diagonal lacks the data() method
Product: Eigen Reporter: Frederic TERRAZZONI <akryus>
Component: Core - generalAssignee: Nobody <eigen.nobody>
Status: NEW ---    
Severity: minor CC: chtz, gael.guennebaud, jacob.benoit.1
Priority: ---    
Version: 3.0   
Hardware: All   
OS: All   
Bug Depends on: 58    
Bug Blocks:    

Description Frederic TERRAZZONI 2011-09-07 22:53:56 UTC
Short example :

MatrixXd mat(10,10);

double * a =; // OK
double * b = mat.diagonal().data(); // The method data() does not exist
Comment 1 Christoph Hertzberg 2011-09-07 23:05:26 UTC
If it is the diagonal of a direct access type, this should be solved directly by solving bug 58. (And for non direct access the data() function would not make sense.)
As a first workaround, one could Matrix<...>::diagonal() return a strided map.
Comment 2 Nobody 2019-12-04 11:06:34 UTC
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