speye - Sparse identity matrix
Syntax
S = speye(m,n)
S = speye(n)
Description
S = speye(m,n) forms an m-by-n sparse
matrix with 1s on the main diagonal.
S = speye(n) abbreviates speye(n,n).
Examples
I = speye(1000) forms the sparse
representation of the 1000-by-1000 identity matrix, which requires
only about 16 kilobytes of storage. This is the same final result
as I = sparse(eye(1000,1000)), but the latter requires
eight megabytes for temporary storage for the full representation.
See Also
spalloc, spones, spdiags, sprand, sprandn
 | specular | | spfun |  |
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