Arithmetic Routines
add
public static add($x1, $x2) : CArray
Add arguments element-wise.
Parameters
CArray|Array
$x1 $x2 Input arrays.
Returns
CArray
The sum of $x1
and $x2
, element-wise.
Examples
Example 1
$x1 = CArray::arange(9.0);
$x1 = CArray::reshape($x1, [3, 3]);
$x2 = CArray::arange(3.0);
echo CArray::add($x1, $x2);
[[ 0 2 4 ]
[ 3 5 7 ]
[ 6 8 10 ]]
Example 2
$a = new CArray([[1, 2], [3, 4]]);
$b = new CArray([[5, 6], [7, 8]]);
$c = $a + $b; // Same as CArray::add
echo $c;
[[ 6 8 ]
[ 10 12 ]]
subtract
public static subtract($x1, $x2) : CArray
Subtract arguments element-wise.
Parameters
CArray|Array
$x1 $x2 Input arrays.
Returns
CArray
The difference of $x1
and $x2
, element-wise.
Examples
Example 1
$x1 = CArray::arange(9.0);
$x1 = CArray::reshape($x1, [3, 3]);
$x2 = CArray::arange(3.0);
echo CArray::subtract($x1, $x2);
[[ 0 0 0 ]
[ 3 3 3 ]
[ 6 6 6 ]]
Example 2
$x1 = CArray::arange(9.0);
$x1 = CArray::reshape($x1, [3, 3]);
$x2 = CArray::arange(3.0);
echo ($x1 - $x2);
[[ 0 0 0 ]
[ 3 3 3 ]
[ 6 6 6 ]]
multiply
public static multiply($x1, $x2) : CArray
Multiply arguments element-wise.
Parameters
CArray|Array
$x1 $x2 Input arrays.
Returns
CArray
The multiplication of $x1
and $x2
, element-wise.
Examples
Example 1
$x1 = CArray::arange(9.0);
$x1 = CArray::reshape($x1, [3, 3]);
$x2 = CArray::arange(3.0);
echo CArray::multiply($x1, $x2);
[[ 0 1 4 ]
[ 0 4 10 ]
[ 0 7 16 ]]
Example 2
$x1 = CArray::arange(9.0);
$x1 = CArray::reshape($x1, [3, 3]);
$x2 = CArray::arange(3.0);
echo ($x1 * $x2);
[[ 0 1 4 ]
[ 0 4 10 ]
[ 0 7 16 ]]
divide
public static divide($x1, $x2) : CArray
Returns a true division of the inputs, element-wise.
Parameters
CArray|Array
$x1 Dividend
CArray|Array
$x2 Divisor
Returns
CArray
Return array.
Examples
Example 1
echo CArray::divide([1, 2, 3, 4, 5], 4);
[ 0.25000000 0.50000000 0.75000000 1.00000000 1.25000000 ]
Example 2
$a = new CArray([[1, 2], [3, 4]]);
echo ($a / 4);
[[ 0.25000000 0.50000000 ]
[ 0.75000000 1.00000000 ]]
power
public static power($x1, $x2) : CArray
$x1
array elements raised to powers from$x2
array, element-wise.
Parameters
CArray|Array
$x1 Bases
CArray|Array
$x2 Exponents
Returns
CArray
The bases in $x1
raised to the exponents in $x2
.
Examples
Example 1
$x1 = CArray::arange(6);
echo CArray::power($x1, 3);
[ 0 1 8 27 64 125 ]
mod
public static mod($x1, $x2) : CArray
Return element-wise remainder of division.
Parameters
CArray|Array
$x1 Dividend
CArray|Array
$x2 Divisor
Returns
CArray
The element-wise remainder
Examples
Example 1
echo CArray::mod([4, 7], [2, 3]);
[ 0. 1. ]
remainder
public static remainder($x1, $x2) : CArray
Return element-wise remainder of division.
Parameters
CArray|Array
$x1 Dividend
CArray|Array
$x2 Divisor
Returns
CArray
The element-wise remainder
Examples
Example 1
echo CArray::remainder([4, 7], [2, 3]);
[ 0. 1. ]
negative
public static negative($x) : CArray
Numerical negative, element-wise.
Parameters
CArray|Array
$x Input array.
Returns
CArray
Return array.
Examples
Example 1
echo CArray::negative([1, -1]);
[ -1. 1. ]
sqrt
public static sqrt($x) : CArray
reciprocal
public static reciprocal($x) : CArray
Return
1/$x
of the argument, element-wise.
Parameters
CArray|Array
$x Input array.
Returns
CArray
Return array.
Examples
Example 1
echo CArray::reciprocal([1, 2., 3.33]);
[ 1.00000000 0.50000000 0.33333333 ]