Software

There are three mathematical and statistical libraries available at STScI: the International Mathematics and Statistics Library (IMSL), the Numerical Algorithms Library (NAg), and the Numerical Recipes library.

`MATH/LIBRARY`

, `STAT/LIBRARY`

, and `SFUN/LIBRARY`

.
The `MATH/LIBRARY`

contains 426 routines, separated by function into groups called *chapters*, for example, routines for solving linear systems are grouped into chapter 1, routines for solving differential equations are grouped into chapter 5, etc.

Statistical analysis routines are located in the `STAT/LIBRARY`

, which is divided into 20 chapters.

The `SFUN/LIBRARY`

contains special functions. It is not divided into chapters, but rather into 12 sections.

A complete set of documentation is available in the Science Software Support Office. The documents include an alphabetical list of all routines and a keyword index. Online help can be found under the topic `math_libraries`

. Users who need additional help using IMSL subroutines should contact the Science Software Support Office.

The NAg library is described in a set of manuals that are available in the Science Software Support Office. Each routine is described in detail as to the inputs, outputs, and the meaning of error flags. A sample program listing for each routine allows you to verify that you are using the routine properly. Online help is also available by typing the following command (note that the usual VMS help facility is not used for NAg):

$ NAGHELP

`SYS$LOCAL:[NUMREC.FOR]`

.

- IMSL
- NAg
- Numerical Recipes

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