pymath.identity

Creates the n × n identity matrix.

This function is located in the pymath module. See pymath for the matrix representation.

I = pymath.identity(n)

Parameter	Type	Description
n	integer	The size of the (square) identity matrix. Must be ≥ 1.

Return value

Type	Description
I	A new n × n identity matrix (1 on the diagonal, 0 elsewhere).

Notes:

• For n ≤ 10 a dense matrix is returned. For larger n a sparse matrix is returned (a size field plus one entry per row); both forms are accepted as input by the other pymath functions.

Example:

local I = pymath.identity(3)
-- I == {{1, 0, 0},
--       {0, 1, 0},
--       {0, 0, 1}}

Version Support:

Minimum PYTHA Version: V27

See also:

pymath, pymath.dot, pymath.inverse