Actual source code: UFgetPetscMat.m
petsc-3.10.5 2019-03-28
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      1: % UFgetPetscMat.m
      2: % modified from UFget_example.m
      3: %   This script
      4: %     (1) gets the selected index file of the UF sparse matrix collection,
      5: %     (2) loads in matrices in matlab format in increasing order of
      6: %         number of rows in the selected matrices,
      7: %     (3) writes into PETSc binary format in the given directory with
      8: %         each matrix named as A_{id}
      9: %
     10: %   See also UFget_example.m
     11: %   Copyright 2009, PETSc Team.

     13: index = UFget;

     15: % sets selection here
     16: f = find (index.nrows == index.ncols & index.nrows > 940000 & index.isReal) ;
     17: [y, j] = sort (index.nrows (f)) ;
     18: f = f (j) ;

     20: for i = f
     21:     %loads in matrix in matlab format
     22:     %---------------------------------
     23:     fprintf ('Loading %s%s%s, please wait ...\n', ...
     24:         index.Group {i}, filesep, index.Name {i}) ;
     25:     Problem = UFget (i,index) ;
     26:     disp (Problem) ;
     27:     title (sprintf ('%s:%s', Problem.name, Problem.title')) ;

     29:     % convets to PETSc binary format and writes into ~mat/A_{id}
     30:     %-----------------------------------------------------------
     31:     fname = ['mat/A',num2str(i)];
     32:     fprintf ('write matrix into petsc binary file %s ...\n',fname);
     33:     PetscBinaryWrite(fname,Problem.A);
     34:     %input ('hit enter to continue:') ;
     35: end