# ?copy

Copies vector to another vector.

## Syntax

FORTRAN 77:

call scopy(n, x, incx, y, incy)

call dcopy(n, x, incx, y, incy)

call ccopy(n, x, incx, y, incy)

call zcopy(n, x, incx, y, incy)

Fortran 95:

call copy(x, y)

## Description

The ?copy routines perform a vector-vector operation defined as
`y = x,`

where x and y are vectors.

## Input Parameters

n

  INTEGER. Specifies the number of elements in vectors x and y.

x

  REAL for scopy

  DOUBLE PRECISION for dcopy

  COMPLEX for ccopy

  DOUBLE COMPLEX for zcopy

  Array, DIMENSION at least `(1 + (n-1)*abs(incx))`.

incx

  INTEGER. Specifies the increment for the elements of x.

y

  REAL for scopy

  DOUBLE PRECISION for dcopy

  COMPLEX for ccopy

  DOUBLE COMPLEX for zcopy

  Array, DIMENSION at least `(1 + (n-1)*abs(incy))`.

incy

  INTEGER. Specifies the increment for the elements of y.

## Output Parameters

y

  Contains a copy of the vector x if n is positive. Otherwise, parameters are unaltered.

## Fortran 95 Interface Notes

Routines in Fortran 95 interface have fewer arguments in the calling sequence than their FORTRAN 77 counterparts. For general conventions applied to skip redundant or reconstructible arguments, see Fortran 95 Interface Conventions.

Specific details for the routine copy interface are the following:

x

  Holds the vector of length(n).

y

  Holds the vector of length (n).

Parent topic: BLAS Level 1 Routines