NdArray

Attributes

• NdArray::data - Access data as a PHP array.
• NdArray::ndim - Number of dimensions of an array.
• NdArray::shape - Tuple of array dimensions.
• NdArray::size - Number of elements of an array.
• NdArray::T - Permute the dimensions of an array.

Array basics

• NdArray::copy() - Copy an array
• NdArray::negative() - Numerical negative, element-wise
• NdArray::is_square() - Check that it's a square matrix.

Shape manipulation

• NdArray::ravel() - Flatten an array
• NdArray::reshape() - Reshape an array
• NdArray::resize() - Resize an array

Mathematical functions

• NdArray::cos() - Cosine element-wise.
• NdArray::sin() - Trigonometric sine, element-wise.
• NdArray::tan() - Compute tangent element-wise.

Arithmetic

• NdArray::add() - Add two matrices.
• NdArray::divide() - Divide two matrices, element-wise.
• NdArray::dot() - Dot product of two matrices.
• NdArray::multiply() - Multiply two matrices, element-wise.
• NdArray::power() - Array elements raised to powers, element-wise.
• NdArray::reciprocal() - Return the reciprocal of the argument, element-wise.
• NdArray::sqrt() - The non-negative square-root of an array, element-wise.
• NdArray::square() - The element-wise square of the matrix.
• NdArray::subtract() - Subtract two matrices element-wise.

Sums, products, differences

• NdArray::prod() - Documentation does NOT exist for this function
• NdArray::sum() - Sum all elements.
• NdArray::trace() - Sum along diagonals.
• NdArray::trapz() - Integrate along the given axis using the composite trapezoidal rule.

Logarithms

• NdArray::log() - Return the natural logarithm, element-wise.
• NdArray::log10() - Return the base 10 logarithm, element-wise.
• NdArray::log2() - Return the base 2 logarithm, element-wise.

Exponents

• NdArray::exp() - Calculate the exponential of all elements in the array.
• NdArray::expm1() - Calculate exp(element) - 1 in the input array.
• NdArray::exp2() - Calculate 2 ** element, element-wise.

Triangle

• NdArray::tril() - Construct a triangle matrix based on the lower triangle of another one.
• NdArray::triu() - Construct a triangle matrix based on the upper triangle of another one.

Floating point

• NdArray::copysign() - Change the sign to that of given matrix, element-wise.
• NdArray::signbit() - Returns element-wise true where signbit is set (less than zero).

Misc.

• NdArray::vander() - Generate a Vandermonde matrix.