NumPhp::identity

Construct a square 2-D array with ones on the diagonal and zeros elsewhere.

Description


          SciPhp\NdArray 
          NumPhp::identity(
          
            int
            $side
          )

Parameters

$side: A positive integer. Represents number of rows.

Return Values

A SciPhp\NdArray

Examples

Example #1: Constructing a 4x4 identity matrix


use SciPhp\NumPhp as np;

$m = np::identity(4);

print $m;

The above example will output:

[[1  0  0  0]
 [0  1  0  0]
 [0  0  1  0]
 [0  0  0  1]]

See Also

NumPhp::diagonal() - Extract a diagonal.
NumPhp::diagflat() - Create a two-dimensional array with the flattened input as a diagonal.
NumPhp::diag() - Extract a diagonal or construct a diagonal array.
NumPhp::eye() - Construct a 2-D array with ones on the diagonal and zeros elsewhere.
NdArray::trace() - Sum along diagonals.
NumPhp::linspace() - Create a range with a defined number of values.

This page was last modified on Wednesday, 06 January 2021, at 20:01. Edit on github