Scilab Online Help
2026.0.0 - English

Sparse Matrix

• Sparse Jacobian computation
  • spCompHessian — Consruct a compressed Hessian engine from its sparsity pattern using column intersection graph coloring
  • spCompJacobian — Consruct a compressed Jacobian engine from its sparsity pattern using column intersection graph coloring
  • spyCol — Represent sparsity pattern of a matrix with column coloring
• Sparse Decompositions
  • ludel — utility function used with lufact
  • lufact — sparse lu factorization
  • luget — extraction of sparse LU factors
  • lusolve — sparse linear system solver
  • spchol — sparse cholesky factorization
• Linear Equations (Iterative Solvers)
  • conjgrad — conjugate gradient solvers
  • gmres — Generalized Minimum RESidual method
  • qmr — quasi minimal residual method with preconditioning
• Sparse Matrix Manipulation
  • issparse — tests whether the input is sparse encoded (numeric or boolean)
  • nnz — number of non zero entries in a matrix
  • speye — sparse identity matrix
  • spones — sparse matrix
  • sprand — sparse random matrix
  • spzeros — sparse zero matrix
• Sparse Matrix Conversion
  • adj2sp — converts adjacency form into sparse matrix.
  • full — sparse to full matrix conversion
  • sp2adj — converts sparse matrix into adjacency form
  • sparse — sparse matrix definition
  • spcompack — converts a compressed adjacency representation
  • spget — retrieves entries of sparse matrix
  • spset — Set non-zeros entries of sparse matrix
• chfact — sparse Cholesky factorization
• chsolve — sparse Cholesky solver
• ordmmd — Compute multiple minimum degree ordering

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