speye - sparse identity matrix

Calling Sequence

Isp=speye(nrows,ncols)

Isp=speye(A)

Parameters

• nrows : integer (number of rows)
• ncols : integer (number os columns)
• A : sparse matrix
• sp : sparse identity matrix

Description

Isp=speye(nrows,ncols) returns a sparse identity matrix Isp with nrows rows, ncols columns. (Non square identity matrix have a maximal number of ones along the main diagonal).

Isp=speye(A) returns a sparse identity matrix with same dimensions as A. If [m,n]=size(A), speye(m,n) and speye(A) are equivalent. In particular speye(3) is not equivalent to speye(3,3).

Examples

eye(3,3)-full(speye(3,3))
 

See Also

sparse  full  eye  spzeros  spones