create a band matrix
list or vector
Important: The linalg package has been deprecated. Use the superseding command LinearAlgebra[BandMatrix], instead.
- For information on migrating linalg code to the new packages, see examples/LinearAlgebraMigration.
The call band(b, n) creates an n x n banded matrix using the elements of b. The number of elements of b must be odd and not greater than 2*n-1.
If b has n elements, the middle n diagonals of the result are initialized to the elements of b, in left-to-right order. In each diagonal all elements have the same value.
If 2*n-1 is larger than the length of b, then the remaining sub- and super-diagonals are set to zero.
The matrix result uses a sparse indexing function.
The command with(linalg,band) allows the use of the abbreviated form of this command.
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