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See also: Format of the matrix file 

Format of the sparse matrix file

The first line of a sparse matrix file contains the unique identifier 'SLD_sparse_matrix'. This identifier is used by LoadSparseMat to ensure that the format is correct. The next line contains the number of non-zero elements of the sparse matrix. The next two lines contain the lowest and highest column and row indices. All other lines contain the matrix data using the format [ix,iy]=value. All lines may contain comments separated by double slashes.

The following example shows a small sample matrix :

 
SDL_sparse_matrix 
12 // number of elements in sparse matrix 
2 9 // lowest and highest column 
1 10 // lowest and highest row 
[2,1]=211 
[3,2]=3002 
[3,5]=305 
[3,7]=38777 
[3,8]=8 
[3,10]=30 
[5,7]=4421107 
[7,7]=712007 
[8,1]=112001 
[8,8]=22 
[9,1]=21401 
[9,7]=933

Last Update: 2023-Feb-06