Name

gf_spmat_set — Modification of the content of a getfem sparse matrix.

Calling Sequence

gf_spmat_set(M,'clear'[, I[, J]])
gf_spmat_set(M,'scale', V)
gf_spmat_set(M,'transpose')
gf_spmat_set(M,'conjugate')
gf_spmat_set(M,'transconj')
gf_spmat_set(M,'to_csc')
gf_spmat_set(M,'to_wsc')
gf_spmat_set(M,'to_complex')
gf_spmat_set(M,'diag', mat D [, ivec E])
gf_spmat_set(M,'assign', ivec I, ivec J, V)gf_spmat_set(M,'add', I, J, V)
    

Description

  • gf_spmat_set(M,'clear'[, list I[, list J]]) Erase the non-zero entries of the matrix. The optional arguments I and J may be specified to clear a sub-matrix instead of the entire matrix.

  • gf_spmat_set(M,'scale',scalar v) Multiplies the matrix by a scalar value `v`.

  • gf_spmat_set(M,'transpose') Transpose the matrix.

  • gf_spmat_set(M,'conjugate') Conjugate each element of the matrix.

  • gf_spmat_set(M,'transconj') Transpose and conjugate the matrix.

  • gf_spmat_set(M,'to_csc') Convert the matrix to CSC storage. CSC storage is recommended for matrix-vector multiplications.

  • gf_spmat_set(M,'to_wsc') Convert the matrix to WSC storage. Read and write operation are quite fast with WSC storage.

  • gf_spmat_set(M,'to_wsc') Convert the matrix to WSC storage. Read and write operation are quite fast with WSC storage.

  • gf_spmat_set(M,'diag',mat D [, ivec E]) Change the diagonal (or sub-diagonals) of the matrix. If E is given, D might be a matrix and each column of E will contain the sub-diagonal number that will be filled with the corresponding column of D.

  • gf_spmat_set(M,'assign',ivec I, ivec J, mat V) Copy V into the sub-matrix 'M(I,J)'. V might be a sparse matrix or a full matrix.

  • gf_spmat_set(M,'add',ivec I, ivec J, mat V) Add V to the sub-matrix 'M(I,J)'. V might be a sparse matrix or a full matrix.

See Also

gf_spmat_get, gf_spmat

Authors

Y. Collette