---
name: "sdrvrf4.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/sdrvrf4.f"
---

# sdrvrf4.f(3)

## NAME

TESTING/LIN/sdrvrf4.f

## SYNOPSIS

### Functions/Subroutines

subroutine **sdrvrf4** (nout, nn, nval, thresh, c1, c2, ldc, crf, a, lda, s\_work\_slange)\
 **SDRVRF4**

## Function/Subroutine Documentation

### subroutine sdrvrf4 (integer nout, integer nn, integer, dimension( nn ) nval, real thresh, real, dimension( ldc, \* ) c1, real, dimension( ldc, \*) c2, integer ldc, real, dimension( \* ) crf, real, dimension( lda, \* ) a, integer lda, real, dimension( \* ) s\_work\_slange)

**SDRVRF4**

**Purpose:**

```
!>
!> SDRVRF4 tests the LAPACK RFP routines:
!>     SSFRK
!>
```

**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 REAL
!>                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.
!>
```

*C1*

```
!>          C1 is REAL array,
!>                dimension (LDC,NMAX)
!>
```

*C2*

```
!>          C2 is REAL array,
!>                dimension (LDC,NMAX)
!>
```

*LDC*

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

*CRF*

```
!>          CRF is REAL array,
!>                dimension ((NMAX*(NMAX+1))/2).
!>
```

*A*

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

*LDA*

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

*S\_WORK\_SLANGE*

```
!>          S_WORK_SLANGE is REAL array, dimension (NMAX)
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **116** of file **sdrvrf4.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.