spy

Visualize sparsity pattern of matrix.

Syntax

• spy(S)
• spy(S, LineSpec)
• spy(S, LineSpec, MarkerSize)

Input argument

• S - matrix: sparse or dense.
• LineSpec - Line style, marker, and/or color: character vector or scalar string.
• MarkerSize - positive integer scalar value.

Description

spy(S) plots the sparsity pattern of the sparse matrix S.

Examples

f = figure();
rng('default');
S = sparse((rand(1, 10) + 1) * 100, (rand(1, 10) + 1) * 100 , (rand(1, 10) + 1) * 10);
spy(S);

f = figure();
rng('default');
S = sparse((rand(1, 10) + 1) * 100, (rand(1, 10) + 1) * 100 , (rand(1, 10) + 1) * 100);
spy(S, 45);

f = figure();
spy();

See also

sparse, plot.

History

Author

Allan CORNET