Random number generation in FORTRAN - 未名空间MITBBS历史存档

国际科技财经博客移民网络热点娱乐民生时事公众号

Redian新闻

>未名空间

>Computation - 科学计算

Random number generation in FORTRAN

Random number generation in FORTRAN# Computation - 科学计算

g*d2008-07-23 07:07

1 楼

对FORTRAN不熟，请教各位：
我想用别人写的一个程序，里面有用genunf,gennor gengam来generate random
numbers from uniform, normal and gamma distribution.但是我得到“unresolved
external symbol"的错误，这是为什么？　FORTRAN里没有这些function吗？
我以前用过IMSL　STAT/LIBRARY里的subroutines (RNUNF, RNNOR, RNGAM),可以。但我
尽量不想改现成的程序。
谢谢。

O*e2008-07-23 07:07

2 楼

In Fortran 77, there is no standard way to call a random number generator.
Depending on the application, it may call its own generator, or a generator
provided by some library, and these could have any name.
Fortran 9x specifies how a random number generator for uniform distribution
between 0 and 1 is to be called, but does not specify the algorithm that is
used for the generator:
call random_number(...)
call random_seed(...)
"Unresolved external symbol" means that the linker (which links

【在 g********d 的大作中提到】

: 对FORTRAN不熟，请教各位：
: 我想用别人写的一个程序，里面有用genunf,gennor gengam来generate random
: numbers from uniform, normal and gamma distribution.但是我得到“unresolved
: external symbol"的错误，这是为什么？　FORTRAN里没有这些function吗？
: 我以前用过IMSL　STAT/LIBRARY里的subroutines (RNUNF, RNNOR, RNGAM),可以。但我
: 尽量不想改现成的程序。
: 谢谢。

g*d2008-07-23 07:07

3 楼

Thank you so much for your anwser.
It seems that I will have to replace the functions with the subroutines in
IMSL libraries.

generator
distribution
is

【在 O******e 的大作中提到】

: In Fortran 77, there is no standard way to call a random number generator.
: Depending on the application, it may call its own generator, or a generator
: provided by some library, and these could have any name.
: Fortran 9x specifies how a random number generator for uniform distribution
: between 0 and 1 is to be called, but does not specify the algorithm that is
: used for the generator:
: call random_number(...)
: call random_seed(...)
: "Unresolved external symbol" means that the linker (which links