---
name: "dlafts.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/dlafts.f"
---

# dlafts.f(3)

## NAME

TESTING/EIG/dlafts.f

## SYNOPSIS

### Functions/Subroutines

subroutine **dlafts** (type, m, n, imat, ntests, result, iseed, thresh, iounit, ie)\
 **DLAFTS**

## Function/Subroutine Documentation

### subroutine dlafts (character\*3 type, integer m, integer n, integer imat, integer ntests, double precision, dimension( \* ) result, integer, dimension( 4 ) iseed, double precision thresh, integer iounit, integer ie)

**DLAFTS**

**Purpose:**

```
!>
!>    DLAFTS tests the result vector against the threshold value to
!>    see which tests for this matrix type failed to pass the threshold.
!>    Output is to the file given by unit IOUNIT.
!>
```

```
!>  TYPE   - CHARACTER*3
!>           On entry, TYPE specifies the matrix type to be used in the
!>           printed messages.
!>           Not modified.
!>
!>  N      - INTEGER
!>           On entry, N specifies the order of the test matrix.
!>           Not modified.
!>
!>  IMAT   - INTEGER
!>           On entry, IMAT specifies the type of the test matrix.
!>           A listing of the different types is printed by DLAHD2
!>           to the output file if a test fails to pass the threshold.
!>           Not modified.
!>
!>  NTESTS - INTEGER
!>           On entry, NTESTS is the number of tests performed on the
!>           subroutines in the path given by TYPE.
!>           Not modified.
!>
!>  RESULT - DOUBLE PRECISION               array of dimension( NTESTS )
!>           On entry, RESULT contains the test ratios from the tests
!>           performed in the calling program.
!>           Not modified.
!>
!>  ISEED  - INTEGER            array of dimension( 4 )
!>           Contains the random seed that generated the matrix used
!>           for the tests whose ratios are in RESULT.
!>           Not modified.
!>
!>  THRESH - DOUBLE PRECISION
!>           On entry, THRESH specifies the acceptable threshold of the
!>           test ratios.  If RESULT( K ) > THRESH, then the K-th test
!>           did not pass the threshold and a message will be printed.
!>           Not modified.
!>
!>  IOUNIT - INTEGER
!>           On entry, IOUNIT specifies the unit number of the file
!>           to which the messages are printed.
!>           Not modified.
!>
!>  IE     - INTEGER
!>           On entry, IE contains the number of tests which have
!>           failed to pass the threshold so far.
!>           Updated on exit if any of the ratios in RESULT also fail.
!>
```

**Author**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **97** of file **dlafts.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.