# dlatb4.f - Man Page

TESTING/LIN/dlatb4.f

## Synopsis

### Functions/Subroutines

subroutine **dlatb4** (path, imat, m, n, type, kl, ku, anorm, mode, cndnum, dist)**DLATB4**

## Function/Subroutine Documentation

### subroutine dlatb4 (character*3 path, integer imat, integer m, integer n, character type, integer kl, integer ku, double precision anorm, integer mode, double precision cndnum, character dist)

**DLATB4**

**Purpose:**

DLATB4 sets parameters for the matrix generator based on the type of matrix to be generated.

**Parameters***PATH*PATH is CHARACTER*3 The LAPACK path name.

*IMAT*IMAT is INTEGER An integer key describing which matrix to generate for this path.

*M*M is INTEGER The number of rows in the matrix to be generated.

*N*N is INTEGER The number of columns in the matrix to be generated.

*TYPE*TYPE is CHARACTER*1 The type of the matrix to be generated: = 'S': symmetric matrix = 'P': symmetric positive (semi)definite matrix = 'N': nonsymmetric matrix

*KL*KL is INTEGER The lower band width of the matrix to be generated.

*KU*KU is INTEGER The upper band width of the matrix to be generated.

*ANORM*ANORM is DOUBLE PRECISION The desired norm of the matrix to be generated. The diagonal matrix of singular values or eigenvalues is scaled by this value.

*MODE*MODE is INTEGER A key indicating how to choose the vector of eigenvalues.

*CNDNUM*CNDNUM is DOUBLE PRECISION The desired condition number.

*DIST*DIST is CHARACTER*1 The type of distribution to be used by the random number generator.

**Author**Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line **118** of file **dlatb4.f**.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dlatb4(3) is an alias of dlatb4.f(3).

Tue Nov 28 2023 12:08:43 Version 3.12.0 LAPACK