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linalg(deprecated)[band] - create a band matrix

Calling Sequence

band(b, n)

Parameters

b

-

list or vector

n

-

positive integer

Description

• 

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.

Examples

Important: The linalg package has been deprecated. Use the superseding command LinearAlgebra[BandMatrix], instead.

withlinalg:

band1,3

100010001

(1)

band1,2,1,4

2100121001210012

(2)

See Also

linalg(deprecated)[diag], LinearAlgebra


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