topic LOG in SAS in SAS Programming

LOG in SAS

csetzkorn — Wed, 19 Jul 2017 09:45:57 GMT

Hi all,

Is the LOG function used in a datastep the log base 10 or the natural log. Tyring to find a definite answer.Thanks!

Christian

Re: LOG in SAS

Kurt_Bremser — Wed, 19 Jul 2017 09:53:34 GMT

Maxim 1: Read the documentation:

http://support.sas.com/documentation/cdl/en/lefunctionsref/69762/HTML/default/viewer.htm#p0urbseuxrkrlyn1tr04y30nt25s.htm

(found with google search for "SAS 9.4 functions and call routines")

Re: LOG in SAS

WarrenKuhfeld — Wed, 19 Jul 2017 10:37:30 GMT

Certainly Kurt's reply to look at the documentation is a good one. Putting in known constants that give known results is an alternative way or at least a way that might help you remember in the future. log(e) = 1, e ** 1 = e, etc.

data;
x = log(constant('e'));
put x;
x = log10(10);
put x;
x = exp(log(constant('e')));
put x;
run;