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- function S = speye(m,n)
- %SPEYE Sparse identity matrix.
- % SPEYE(M,N) forms an M-by-N sparse matrix with 1's on
- % the main diagonal. SPEYE(N) abbreviates SPEYE(N,N).
- % SPEYE(SIZE(A)) is a space-saving SPARSE(EYE(SIZE(A))).
-
- % Copyright (c) 1984-93 by The MathWorks, Inc.
-
- if nargin < 2
- if length(m) == 1
- n = m;
- elseif length(m) == 2
- n = m(2);
- m = m(1);
- else
- error('Please use SPEYE(N), SPEYE(M,N) or SPEYE([M,N]).')
- end
- end
- k = 1:round(min(m,n));
- S = sparse(k,k,1,m,n);
-