<< sparse

Sparse type

spones >>

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speye

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Sparse identity matrix.

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Syntax

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S = speye()

S = speye(n)

S = speye(n, m)

S = speye(sz)

Input argument

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n, m

dimension sizes: nonnegative integer scalar.

sz

dimension sizes: two-element row vector.

Output argument

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S

a sparse matrix.

Description

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S = speye() returns a sparse scalar 1.

S = speye(n) returns a sparse n-by-n identity matrix, with ones on the main diagonal.

S = speye(n, m) returns a sparse n-by-m matrix, with ones on the main diagonal.

S = speye(sz) returns a matrix with ones on the main diagonal.

Example

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tic();S = speye(5000, 5000);toc()
tic();S = sparse(eye(5000, 5000));toc()

See also

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sparse.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET