Important: The linalg package has been deprecated. Use the superseding packages, LinearAlgebra and VectorCalculus, instead.

- For information on migrating linalg code to the new packages, see examples/LinearAlgebraMigration.

The call submatrix(A, Rrange, Crange) returns the submatrix of A selected by the row range Rrange and the column range Crange.

The call submatrix(A, Rlist, Clist) returns the matrix whose (i,j)th element is A[Rlist[i], Clist[j]].

These calling methods can be combined, so for instance the call submatrix(A, Rlist, Crange) is valid, and will return the submatrix of A with rows from Rlist and columns from Crange.

The command with(linalg,submatrix) allows the use of the abbreviated form of this command.