Matrix Norm Routines
norm
public static norm($x) : CArray
Matrix or vector Frobenius norm.
Parameters
CArray|Array
$x Input array.
Returns
CArray
Norm of the matrix or vector.
Examples
Example 1
$a = CArray::arange(9) - 4;
$b = CArray::reshape($a, [3, 3]);
echo CArray::norm($b);
7.745967
det
public static det($a) : CArray
Compute the determinant of an array.
Parameters
CArray|Array
$a Input array.
Returns
CArray
Determinant of $a
.
Examples
Example 1
$a = new CArray([[1, 2], [3, 4]]);
echo CArray::det($a);
-2.000000