topic Re: How to use "Varlist Statement" in Proc DS2 in SAS Programming

How to use "Varlist Statement" in Proc DS2

NewmanChow — Fri, 30 Mar 2018 01:28:55 GMT

Hello Everyone :

The "Variable Lists" page describes you can "Passing Variable List Arguments", I want

to test Varlist statement usage, like this : (SAS 9.4M5 Win x64)

data class;
set sashelp.class;
run;

proc ds2;
data x(overwrite=yes);
/*dcl double age height weight;*/
dcl double y;
varlist vars [age height weight];

method varmean(varlist vars) returns double;
 declare double rst;
 rst = mean(of vars);
end;

method run();
 set class;
 y = varmean([age height weight]);
end;
enddata;
run;
quit;

then I got a "ERROR: Invalid variable list. vars is not a global scalar variable."

Do you know how to use it ,or some paper introduce it ?

Thanks!

Here you can find the page :

http://documentation.sas.com/?docsetId=ds2pg&docsetTarget=p1ko0gchlvwonyn173udvwbvspks.htm&docsetVersion=9.4&locale=zh-CN#n0bk99gpptmbfxn1leucrebh80ft

Re: How to use "Varlist Statement" in Proc DS2

ChrisBrooks — Thu, 29 Mar 2018 13:01:35 GMT

I must admit I've not used earliest before and I can't get it to work either. There are a couple of errors in your code though which won't help:

1. The variable height is misspelt in your varlist declaration; and

2. DS2 can't access the SASHELP library so you'll have to copy CLASS to another library before running the code

It might be worth raising a track with SAS for this as I can't see why it won't work as described in the documentation

Re: How to use "Varlist Statement" in Proc DS2

NewmanChow — Fri, 30 Mar 2018 01:59:39 GMT

Hi ChrisBrooks ,

Thank you for your feedback . I have fixed the Question and raising a track .

Re: How to use "Varlist Statement" in Proc DS2

NewmanChow — Sat, 29 Dec 2018 06:04:48 GMT

Here is SAS Technical Support feedback:
“On the issue, our developer fedback

The DS2 variable list was developed to fulfill a need of DS2 C packages, and it has very limited functionality supporting native DS2 packages and methods. Currently, functionality is NOT provided to extract values from the variables in a variable list in DS2 code.”