`<valarray>`

Article
05/12/2022

Defines the class template valarray<Type> and several supporting class templates and functions.

Requirements

Header: <valarray>

Namespace: std

Note

The <valarray> library uses the #include <initializer_list> statement.

Remarks

These class templates and functions are permitted unusual latitude in the interest of improved performance. Specifically, any function that returns type valarray<T1> may return an object of some other type T2. In that case, any function that accepts one or more arguments of type valarray<T2> must have overloads that accept arbitrary combinations of those arguments, each replaced with an argument of type T2.

Members

Functions

Name	Description
`abs`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the absolute value of the elements of the input `valarray`.
`acos`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the arccosine of the elements of the input `valarray`.
`asin`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the arcsine of the elements of the input `valarray`.
`atan`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the principal value of the arctangent of the elements of the input `valarray`.
`atan2`	Returns a `valarray` whose elements are equal to the arctangent of the Cartesian components specified by a combination of constants and elements of `valarray` inputs.
`begin`
`cos`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the cosine of the elements of the input `valarray`.
`cosh`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the hyperbolic cosine of the elements of the input `valarray`.
`end`
`exp`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the natural exponential of the elements of the input `valarray`.
`log`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the natural logarithm of the elements of the input `valarray`.
`log10`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the base 10 or common logarithm of the elements of the input `valarray`.
`pow`	Operates on the elements of any input `valarray` and constants, returning a `valarray` whose elements are equal to a base specified either by the elements of an input `valarray` or a constant raised to an exponent specified either by the elements of an input `valarray` or a constant.
`sin`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the sine of the elements of the input `valarray`.
`sinh`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the hyperbolic sine of the elements of the input `valarray`.
`sqrt`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the square root of the elements of the input `valarray`.
`swap`
`tan`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the tangent of the elements of the input `valarray`.
`tanh`	Operates on the elements of an input `valarray`, returning a `valarray` whose elements are equal to the hyperbolic tangent of the elements of the input `valarray`.

Operators

Name	Description
`operator!=`	Tests whether the corresponding elements of two equally sized `valarray` objects are unequal or whether all the elements of a `valarray` are unequal to a specified value of the `valarray` object's element type.
`operator%`	Obtains the remainder of dividing the corresponding elements of two equally sized `valarray` objects or of dividing a `valarray` by a specified value of the `valarray` object's element type or of dividing a specified value by a `valarray`.
`operator&`	Obtains the bitwise AND between corresponding elements of two equally sized `valarray` objects or between a `valarray` and a specified value of the element type.
`operator&&`	Obtains the logical AND between corresponding elements of two equally sized `valarray` objects or between a `valarray` and a specified value of the `valarray` object's element type.
`operator>`	Tests whether the elements of one `valarray` are greater than the elements of an equally sized `valarray` or whether all the elements of a `valarray` are greater or less than a specified value of the `valarray` object's element type.
`operator>=`	Tests whether the elements of one `valarray` are greater than or equal to the elements of an equally sized `valarray` or whether all the elements of a `valarray` are greater than or equal to or less than or equal to a specified value.
`operator>>`	Right-shifts the bits for each element of a `valarray` a specified number of positions or by an element-wise amount specified by a second `valarray`.
`operator<`	Tests whether the elements of one `valarray` are less than the elements of an equally sized `valarray` or whether all the elements of a `valarray` are greater or less than a specified value.
`operator<=`	Tests whether the elements of one `valarray` are less than or equal to the elements of an equally sized `valarray` or whether all the elements of a `valarray` are greater than or equal to or less than or equal to a specified value.
`operator<<`	Left shifts the bits for each element of a `valarray` a specified number of positions or by an element-wise amount specified by a second `valarray`.
`operator*`	Obtains the element-wise product between corresponding elements of two equally sized `valarray` objects or of between a `valarray` a specified value of the `valarray` object's element type.
`operator+`	Obtains the element-wise sum between corresponding elements of two equally sized `valarray` objects or of between a `valarray` a specified value of the `valarray` object's element type.
`operator-`	Obtains the element-wise difference between corresponding elements of two equally sized `valarray` objects or of between a `valarray` a specified value of the `valarray` object's element type.
`operator/`	Obtains the element-wise quotient between corresponding elements of two equally sized `valarray` objects or of between a `valarray` a specified value of the `valarray` object's element type.
`operator==`	Tests whether the corresponding elements of two equally sized `valarray` objects are equal or whether all the elements of a `valarray` are equal a specified value of the `valarray` object's element type.
`operator^`	Obtains the bitwise exclusive OR between corresponding elements of two equally sized `valarray` objects or between a `valarray` and a specified value of the element type.
`operator\|`	Obtains the bitwise OR between corresponding elements of two equally sized `valarray` objects or between a `valarray` and a specified value of the element type.
`operator\|\|`	Obtains the logical OR between corresponding elements of two equally sized `valarray` objects or between a `valarray` and a specified value of the `valarray` object's element type.

Classes

Name	Description
`gslice` class	A utility class to `valarray` that is used to define multi-dimensional slices of a `valarray`.
`gslice_array` class	An internal, auxiliary class template that supports general slice objects by providing operations between subset arrays defined by the general slice of a `valarray`.
`indirect_array` class	An internal, auxiliary class template that supports objects that are subsets of `valarray` objects by providing operations between subset arrays defined by specifying a subset of indices of a parent `valarray`.
`mask_array` class	An internal, auxiliary class template that supports objects that are subsets of parent `valarray` objects, specified with a Boolean expression, by providing operations between the subset arrays.
`slice` class	A utility class to `valarray` that is used to define one-dimensional, vector-like subsets of a `valarray`.
`slice_array` class	An internal, auxiliary class template that supports `slice` objects by providing operations between subset arrays defined by the slice of a `valarray`.
`valarray<Type>` class	The class template describes an object that controls a sequence of elements of type `Type` that are stored as an array and designed for high-speed mathematical operations, optimized for computational performance.

Specializations

Name	Description
`valarray<bool>` class	A specialized version of the class template `valarray<Type>` for elements of type `bool`.

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