speye

Sparse identity matrix.

📝 Syntax

• S = speye()

• S = speye(n)

• S = speye(n, m)

• S = speye(sz)

📥 Input argument

• n, m - dimension sizes: nonnegative integer scalar.

• sz - dimension sizes: two-element row vector.

📤 Output argument

• S - a sparse matrix.

📄 Description

S = speye() returns a sparse scalar 1.

S = speye(n) returns a sparse n-by-n identity matrix, with ones on the main diagonal.

S = speye(n, m) returns a sparse n-by-m matrix, with ones on the main diagonal.

S = speye(sz) returns a matrix with ones on the main diagonal.

💡 Example

tic();S = speye(5000, 5000);toc()
tic();S = sparse(eye(5000, 5000));toc()

🔗 See also

sparse.

🕔 History

Version	📄 Description
1.0.0	initial version