Functions in PUT statement
in [SAS]
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From: "Howard Schreier <hs AT dc-sug DOT org>" on 16 Oct 2007 18:33 On Tue, 16 Oct 2007 04:26:30 -0700, Hari <excel_hari(a)YAHOO.COM> wrote: >Hi, > >I was working through CALL SYMPUT and SYMGET in online learning and >wanted to see whether the values assigned during a CALL SYMPUT can be >seen in a new data step utilizing SYMGET statement. > >Options symbolgen; >data null_; > set sasuser.schedule; >call symput('same_val', 'Hallis, Dr. George'); >call symput(compress('current_val'|| _n_), teacher); >run; > >Data _null_; >Set null_; >MacroVarName = "current_val"|| left(_n_); >MacroVarValue = symget(MacroVarName); >Put 'MacroVarName:' MacroVarName 'MacroVarValue:' MacroVarValue; >Run; > >The above worked perfectly fine. > >But, if I modify the second data step > >Data _null_; >Set null_; >/*MacroVarName = "current_val"|| left(_n_);*/ >/*MacroVarValue = symget(MacroVarName);*/ >Put 'MacroVarName:' "current_val"|| left(_n_) 'MacroVarValue:' >symget(MacroVarName); >Run; > >The i get error in put statement > >274 Data _null_; >275 Set null_; >276 /*MacroVarName = "current_val"|| left(_n_);*/ >277 /*MacroVarValue = symget(MacroVarName);*/ >278 Put 'MacroVarName:' "current_val"|| left(_n_) 'MacroVarValue:' >symget(MacroVarName); > -- ---------------- > 22 79 > 76 > ---- > 202 >ERROR 22-322: Syntax error, expecting one of the following: a name, a >quoted string, arrayname, > #, (, +, /, //, ;, @, @@, OVERPRINT, _ALL_, _BLANKPAGE_, >_ODS_, _PAGE_. > >ERROR 79-322: Expecting a (. > >ERROR 76-322: Syntax error, statement will be ignored. > >ERROR 202-322: The option or parameter is not recognized and will be >ignored. > >279 Run; > >I have tried with core data step functions within PUT and even those >are failing. I did a very quick read through the SAS documentation for >PUT, but not able to see any restrictions on using SAS function in >PUT? > >Please guide me > >hp The capabilities of the PUT statement have already been discussed, but let's look at the documentation question which Hari asked. The doc does not express a restriction concerning specification of functions (or, more generally, expressions) because there is nothing in the doc which implies that functions are permitted. See Base SAS SAS Language Reference: Dictionary Dictionary of Language Elements Statements PUT Statement Arguments specification It's interesting that the PUT statement is able to invoke evaluation of expressions; specifically, numeric expressions, contained in parentheses, are allowed as pointer controls.
From: Chang Chung on 19 Oct 2007 10:20
On Tue, 16 Oct 2007 11:32:12 -0400, Richard A. DeVenezia <rdevenezia(a)WILDBLUE.NET> wrote: >Mike Rhoads wrote: >> Although it would be nice if PUT supported functions, expression >> evaluation, etc., it basically is limited to putting out (1) variable >> values, and (2) constant text. It has an incredible amount of >> flexibility within those constraints (for instance, NAMED output to >> include the names of variables and limited expression evaluation to >> determine where to put things), but that's as far as it goes. > >The PUT statment in SAS Component Language supports object attributes and >methods -- it even supports the = specifier > >main: >... > declare sasuser.objects.foo foo = _new_ sasuser.objects.foo(); > put foo.someMethod1() foo.someMethod2()= foo.attribute1; >... >return; >===log=== >ThisIsReturnedFromMethod1 foo.someMethod2()=ThisWasReturnedFromMethod2 >footribute1 hi, in addition to PUT in data step, PUT in SCL, there is PUT in the sas function compiler in sas/base (proc fcmp), which *is* able to handle expressions (inside of parentheses) but otherwise much crippled compare to the data step's: /* see p.14 of the online doc for the limitations of put in proc fcmp http://support.sas.com/documentation/onlinedoc/base/91/fcmp.pdf */ proc fcmp; x = 2; put (sqrt(x)); run; /* on lst 1.4142135624 */ There is also the PUT in proc template, which also supports calling any data step functions and has interesting syntax of: (from http://support.sas.com/rnd/base/topics/odsmarkup/tagsets.html) PUT | PUTL | PUTQ (<variable> <String> <function> <nl|cr|lf> )* <conditon>; Now, I am wondering about 9.2 data step PUT statement. Do you know if there are any changes on it? Cheers, Chang |