topic Re: Add a Year to a Date Macro in SAS Programming

Add a Year to a Date Macro

DavidPhillips2 — Mon, 23 Nov 2015 20:45:04 GMT

I have a macro like:

%let startYear = '1Jul2015:0:0:0'dt;

How can I add a year to the macro? All the examples I have seen have added a year in the dataset rather than the macro.

Re: Add a Year to a Date Macro

PaigeMiller — Mon, 23 Nov 2015 20:50:13 GMT

I don't understand the question. Your example already has a year in it.

(And we're talking about a macro variable, not a macro, right?)

Re: Add a Year to a Date Macro

DavidPhillips2 — Mon, 23 Nov 2015 20:52:14 GMT

How can I increment a macro variable by one year?

Re: Add a Year to a Date Macro

PaigeMiller — Mon, 23 Nov 2015 21:10:42 GMT

Oh, duh, that should have been obvious but I guess I misread your question.

%let incr_by_one_year=%sysfunc(intnx(dtyear,&startyear,1,s));

%put incr_by_one_year %sysfunc(putn(&incr_by_one_year,datetime16.));

Re: Add a Year to a Date Macro

ballardw — Mon, 23 Nov 2015 21:16:03 GMT

Is there any particular reason you call a datetime value a date?

Re: Add a Year to a Date Macro

DavidPhillips2 — Mon, 23 Nov 2015 21:17:36 GMT

date would be better

Re: Add a Year to a Date Macro

slchen — Mon, 23 Nov 2015 21:58:32 GMT

%let startYear ="1Jul2015:0:0:0"dt;
%let newstarYear=%sysfunc(putn(%sysfunc(intnx(dtyear,&startYear,1,s)),datetime19.));
%put &newstarYear;

Re: Add a Year to a Date Macro

RW9 — Tue, 24 Nov 2015 09:58:22 GMT

Personally I would never use macro varaibles (which are text) for manpulating or using date/time numeric data. I would put them in a parameters dataset, and call them up when needed. Two beneifts, you can manipulate them using the full simple syntax of base SAS, and they are accessible in numerous manners (i.e. call symput, join/merge, call execute).