# dlasrt.f man page

dlasrt.f —

## Synopsis

### Functions/Subroutines

subroutinedlasrt(ID, N, D, INFO)DLASRTsorts numbers in increasing or decreasing order.

## Function/Subroutine Documentation

### subroutine dlasrt (characterID, integerN, double precision, dimension( * )D, integerINFO)

**DLASRT** sorts numbers in increasing or decreasing order.

**Purpose:**

```
Sort the numbers in D in increasing order (if ID = 'I') or
in decreasing order (if ID = 'D' ).
Use Quick Sort, reverting to Insertion sort on arrays of
size <= 20. Dimension of STACK limits N to about 2**32.
```

**Parameters:**

*ID*

```
ID is CHARACTER*1
= 'I': sort D in increasing order;
= 'D': sort D in decreasing order.
```

*N*

```
N is INTEGER
The length of the array D.
```

*D*

```
D is DOUBLE PRECISION array, dimension (N)
On entry, the array to be sorted.
On exit, D has been sorted into increasing order
(D(1) <= ... <= D(N) ) or into decreasing order
(D(1) >= ... >= D(N) ), depending on ID.
```

*INFO*

```
INFO is INTEGER
= 0: successful exit
< 0: if INFO = -i, the i-th argument had an illegal value
```

**Author:**

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

**Date:**

September 2012

Definition at line 89 of file dlasrt.f.

## Author

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

dlasrt(3) is an alias of dlasrt.f(3).