nzmax - Amount of storage allocated for nonzero matrix elements
Syntax
n = nzmax(S)
Description
n = nzmax(S) returns the amount
of storage allocated for nonzero elements.
If S is a sparse matrix... | nzmax(S) is the number of storage locations
allocated for the nonzero elements in S. |
If S is a full matrix... | nzmax(S) = prod(size(S)). |
Often, nnz(S) and nzmax(S) are
the same. But if S is created by an operation which produces
fill-in matrix elements, such as sparse matrix multiplication
or sparse LU factorization, more storage
may be allocated than is actually required, and nzmax(S) reflects
this. Alternatively, sparse(i,j,s,m,n,nzmax) or its simpler
form, spalloc(m,n,nzmax), can set nzmax in
anticipation of later fill-in.
See Also
find, isa, nnz, nonzeros, size, whos
 | numel | | ode15i |  |
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