spy(S)
spy(S,marksize)
spy(S,'color')
spy(S,'color',marksize)
spy(S)
plots the sparsity pattern of any matrix S
.
spy(S,marksize)
, where marksize
is an integer, uses the specified marker size.
spy(S,'color')
, where color
is a string, uses the specified color for the plot markers.
spy(S,'color',marksize)
uses the specified color and size for the plot markers.
S
is usually a sparse matrix, but full matrices are acceptable, in which case the locations of the nonzero elements are plotted.
spy
replaces format +
, which takes much more space to display essentially the same information.
find
,gplot
,symmmd
,symrcm
(c) Copyright 1994 by The MathWorks, Inc.