Search Routines

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argmax

public static argmax($x, $axis = NULL) : CArray

Returns the indices of the maximum values along an axis.

Parameters

CArray|Array $x Input array.

CArray|Array $axis (Optional) The index is into the flattened array, otherwise along the specified axis.

Returns

CArray|Array $x Array of indices into the array. It has the same shape as $x with the dimension along $axis removed.

Examples

Example 1

$a = CArray::arange(6);
$a = CArray::reshape($a, [2, 3]) + 10;
echo CArray::argmax($a);

5

Example 2

$a = CArray::arange(6);
$a = CArray::reshape($a, [2, 3]) + 10;
echo CArray::argmax($a, 0);

[ 1  1  1 ]

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argmin

public static argmin($x, $axis = NULL) : CArray

Returns the indices of the minimum values along an axis.

Parameters

CArray|Array $x Input array.

CArray|Array $axis (Optional) The index is into the flattened array, otherwise along the specified axis.

Returns

CArray|Array $x Array of indices into the array. It has the same shape as $x with the dimension along $axis removed.

Examples

Example 1

$a = CArray::arange(6);
$a = CArray::reshape($a, [2, 3]) + 10;
echo CArray::argmin($a);

0

Example 2

$a = CArray::arange(6);
$a = CArray::reshape($a, [2, 3]) + 10;
echo CArray::argmin($a, 0);

[ 0  0  0 ]