---
name: "dlargv.f"
section: "3"
platform: "linux"
package: "lapack-doc"
version: "3.12.1-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/dlargv.f"
---

# dlargv.f(3)

## NAME

SRC/dlargv.f

## SYNOPSIS

### Functions/Subroutines

subroutine **dlargv** (n, x, incx, y, incy, c, incc)\
 **DLARGV** generates a vector of plane rotations with real cosines and real sines.

## Function/Subroutine Documentation

### subroutine dlargv (integer n, double precision, dimension( \* ) x, integer incx, double precision, dimension( \* ) y, integer incy, double precision, dimension( \* ) c, integer incc)

**DLARGV** generates a vector of plane rotations with real cosines and real sines.

**Purpose:**

```
!>
!> DLARGV generates a vector of real plane rotations, determined by
!> elements of the real vectors x and y. For i = 1,2,...,n
!>
!>    (  c(i)  s(i) ) ( x(i) ) = ( a(i) )
!>    ( -s(i)  c(i) ) ( y(i) ) = (   0  )
!>
```

**Parameters**

*N*

```
!>          N is INTEGER
!>          The number of plane rotations to be generated.
!>
```

*X*

```
!>          X is DOUBLE PRECISION array,
!>                         dimension (1+(N-1)*INCX)
!>          On entry, the vector x.
!>          On exit, x(i) is overwritten by a(i), for i = 1,...,n.
!>
```

*INCX*

```
!>          INCX is INTEGER
!>          The increment between elements of X. INCX > 0.
!>
```

*Y*

```
!>          Y is DOUBLE PRECISION array,
!>                         dimension (1+(N-1)*INCY)
!>          On entry, the vector y.
!>          On exit, the sines of the plane rotations.
!>
```

*INCY*

```
!>          INCY is INTEGER
!>          The increment between elements of Y. INCY > 0.
!>
```

*C*

```
!>          C is DOUBLE PRECISION array, dimension (1+(N-1)*INCC)
!>          The cosines of the plane rotations.
!>
```

*INCC*

```
!>          INCC is INTEGER
!>          The increment between elements of C. INCC > 0.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **103** of file **dlargv.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.