Lapack::identity

(PECL lapack >= 0.1.0)

Lapack::identity — Return an identity matrix

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public static Lapack::identity ( int $n ) : array

Return a size n identity matrix

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n

The height and width of the identity matrix.

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Will return a an array of n arrays, each containing n entries. The diagonals of the matrix will be 1s, the other positions 0.