[mlpack-svn] [MLPACK] #195: Compilation error with arma::SpMat (sparse matrices)

[MLPACK Trac]

#195: Compilation error with arma::SpMat (sparse matrices)
------------------------------+---------------------------------------------
 Reporter:  pram              |        Owner:  rcurtin
     Type:  defect            |       Status:  new    
 Priority:  major             |    Milestone:         
Component:  armadillo sparse  |     Keywords:         
 Blocking:                    |   Blocked By:         
------------------------------+---------------------------------------------
 The executable failing is in
 {{{contrib/pram/max_ip_search/sp_max_ip_main.cpp}}}.

 The following is the compilation error:
 {{{
 [pram at no build]$ make sp_max_ip_main
 [ 50%] Built target contrib_pram
 [100%] Building CXX object
 max_ip_search/CMakeFiles/sp_max_ip_main.dir/sp_max_ip_main.cpp.o
 /usr/include/armadillo_bits/Col_meat.hpp: In constructor
 ‘arma::Col<eT>::Col(const arma::Base<eT, T1>&) [with T1 =
 arma::SpSubview<double>, eT = double]’:
 /net/hu12/pram/work_space/contrib/pram/max_ip_search/sp_max_ip_main.cpp:140:
 instantiated from here
 /usr/include/armadillo_bits/Col_meat.hpp:213: error: no matching function
 for call to ‘arma::Col<double>::operator=(const arma::SpSubview<double>&)’
 /usr/include/armadillo_bits/Mat_bones.hpp:54: note: candidates are: const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const char*) [with eT = double]
 /usr/include/armadillo_bits/Mat_bones.hpp:57: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const std::string&) [with eT =
 double]
 /usr/include/armadillo_bits/Mat_bones.hpp:67: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(eT) [with eT = double]
 /usr/include/armadillo_bits/Mat_bones.hpp:74: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const arma::Mat<eT>&) [with eT =
 double]
 /usr/include/armadillo_bits/Mat_bones.hpp:93: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const arma::subview<eT>&) [with eT
 = double]
 /usr/include/armadillo_bits/Mat_bones.hpp:102: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const arma::subview_cube<eT>&)
 [with eT = double]
 /usr/include/armadillo_bits/Mat_bones.hpp:111: note:                 const
 arma::Mat<eT>& arma::Mat<eT>::operator=(const arma::diagview<eT>&) [with
 eT = double]
 make[3]: ***
 [max_ip_search/CMakeFiles/sp_max_ip_main.dir/sp_max_ip_main.cpp.o] Error 1
 make[2]: *** [max_ip_search/CMakeFiles/sp_max_ip_main.dir/all] Error 2
 make[1]: *** [max_ip_search/CMakeFiles/sp_max_ip_main.dir/rule] Error 2
 make: *** [sp_max_ip_main] Error 2
 }}}

 The code around line 140 in
 {{{contrib/pram/max_ip_search/sp_max_ip_main.cpp}}} is the following:
 {{{
 139     for (size_t i = 0; i < qdata.n_cols; i++) {
 140       arma::vec q = (arma::vec) qdata.col(i);
 141       qdata.col(i) = q / arma::norm(q, 2);
 142     }
 }}}

 Here ''qdata'' is a {{{arma::SpMat<double>}}}

-- 
Ticket URL: <http://trac.research.cc.gatech.edu/fastlab/ticket/195>
MLPACK <www.fast-lab.org>
MLPACK is an intuitive, fast, and scalable C++ machine learning library developed by the FASTLAB at Georgia Tech under Dr. Alex Gray.