---
name: "ddrvrf3.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/ddrvrf3.f"
---

# ddrvrf3.f(3)

## NAME

TESTING/LIN/ddrvrf3.f

## SYNOPSIS

### Functions/Subroutines

subroutine **ddrvrf3** (nout, nn, nval, thresh, a, lda, arf, b1, b2, d\_work\_dlange, d\_work\_dgeqrf, tau)\
 **DDRVRF3**

## Function/Subroutine Documentation

### subroutine ddrvrf3 (integer nout, integer nn, integer, dimension( nn ) nval, double precision thresh, double precision, dimension( lda, \* ) a, integer lda, double precision, dimension( \* ) arf, double precision, dimension( lda, \* ) b1, double precision, dimension( lda, \* ) b2, double precision, dimension( \* ) d\_work\_dlange, double precision, dimension( \* ) d\_work\_dgeqrf, double precision, dimension( \* ) tau)

**DDRVRF3**

**Purpose:**

```
!>
!> DDRVRF3 tests the LAPACK RFP routines:
!>     DTFSM
!>
```

**Parameters**

*NOUT*

```
!>          NOUT is INTEGER
!>                The unit number for output.
!>
```

*NN*

```
!>          NN is INTEGER
!>                The number of values of N contained in the vector NVAL.
!>
```

*NVAL*

```
!>          NVAL is INTEGER array, dimension (NN)
!>                The values of the matrix dimension N.
!>
```

*THRESH*

```
!>          THRESH is DOUBLE PRECISION
!>                The threshold value for the test ratios.  A result is
!>                included in the output file if RESULT >= THRESH.  To have
!>                every test ratio printed, use THRESH = 0.
!>
```

*A*

```
!>          A is DOUBLE PRECISION array, dimension (LDA,NMAX)
!>
```

*LDA*

```
!>          LDA is INTEGER
!>                The leading dimension of the array A.  LDA >= max(1,NMAX).
!>
```

*ARF*

```
!>          ARF is DOUBLE PRECISION array, dimension ((NMAX*(NMAX+1))/2).
!>
```

*B1*

```
!>          B1 is DOUBLE PRECISION array, dimension (LDA,NMAX)
!>
```

*B2*

```
!>          B2 is DOUBLE PRECISION array, dimension (LDA,NMAX)
!>
```

*D\_WORK\_DLANGE*

```
!>          D_WORK_DLANGE is DOUBLE PRECISION array, dimension (NMAX)
!>
```

*D\_WORK\_DGEQRF*

```
!>          D_WORK_DGEQRF is DOUBLE PRECISION array, dimension (NMAX)
!>
```

*TAU*

```
!>          TAU is DOUBLE PRECISION array, dimension (NMAX)
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **116** of file **ddrvrf3.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.