topic Re: what is the difference between in1, in1.a and in1..a; in SAS in SAS Programming

what is the difference between in1, in1.a and in1..a; in SAS

abhityagi — Sun, 09 Jul 2017 09:41:28 GMT

what is the difference between in1, in1.a and in1..a; in SAS.

Re: what is the difference between in1, in1.a and in1..a; in SAS

LinusH — Sun, 09 Jul 2017 10:32:13 GMT

?
Please exemplify!

Re: what is the difference between in1, in1.a and in1..a; in SAS

Astounding — Sun, 09 Jul 2017 12:20:01 GMT

in1 is just a name of something. It's probably a variable name, but could be anything that would be named within a SAS program (a variable, a data set , an array). So its meaning depends on the context within the program.

in1.a also depends on context. In most cases, it is the data set A, stored within the library IN1. But within SQL, it is the variable A stored within the data set IN1. There may be other possibilities, but those are the main ones.

in1..a doesn't exist in SAS.

Re: what is the difference between in1, in1.a and in1..a; in SAS

Kurt_Bremser — Sun, 09 Jul 2017 14:10:46 GMT

Just out of curiosity: where did you get the notion that there is such a thing as "in1..a" in SAS?

Re: what is the difference between in1, in1.a and in1..a; in SAS

Tom — Sun, 09 Jul 2017 14:15:15 GMT

The place in SAS where you might see double periods like that would be when using macro variables to generate a string that needs to have a period in it. For example if you had a macro variable than contained the library name and you wanted to generate a reference to particual dataset in that library.

libname mydata 'my path';
%let libref=mydata;
proc print data=&libref..myds;
run;

The first period is used by the macro processor to indicate the end of the macro variable name. So the result of "&libref..myds" is the string "mydata.myds".