topic Re: Saved Module/Function in PROC IML in SAS/IML Software and Matrix Computations

Saved Module/Function in PROC IML

hellohere — Sun, 11 Sep 2022 08:43:48 GMT

Inside of PROC IML, function/module can be stored and loaded. But one quest, what if two function with identical

name but with different set of parameters, does that cause problem?! Must take changed name to differentialize

them or any other way out?!

store module=mymod1;            /* store module MYMOD1          */

LOAD MODULE= (modules) ;

Re: Saved Module/Function in PROC IML

Ksharp — Sun, 11 Sep 2022 10:25:45 GMT

Why not post it at IML forum ? @Rick_SAS is there.

https://communities.sas.com/t5/SAS-IML-Software-and-Matrix/bd-p/sas_iml

Re: Saved Module/Function in PROC IML

Rick_SAS — Sun, 11 Sep 2022 10:38:51 GMT

You cannot define two modules that have the same name and different parameters. The second definition will overwrite the first. Or if you use the LOAD statement, the module that is stored will overwrite the current definition.

You can use define a module to have optional arguments that take on default values when they are not specified. For example,

/* return 1 if x[i] is within eps of y[i] for all i */
start IsEqual(x, y, eps=1e-6);
   return( all( abs(x-y)<=eps) );  
finish;

You can call the module as

b = IsEqual(x, y); /* Default: compare within 1e-6 */

or you can specify the third argument as follows:
b2 = IsEqual(x, y, 1e-12); /* compare within 1e-12 */

For more information on default and optional arguments in SAS/IML modules, see the section "Optional parameters and default values" in the article "Everything you wanted to know about writing SAS/IML modules."

Re: Saved Module/Function in PROC IML

hellohere — Sun, 11 Sep 2022 12:26:17 GMT