topic Re: macros, inserting %let strings into code in SAS Procedures

macros, inserting %let strings into code

skipper — Tue, 01 May 2012 20:08:26 GMT

I have code

%let idn = b;

%let Strike = 149;

%productData;

%MACRO productData;

DATA product_%idn;

set home.euro_c_%strike_1109;

%idn_datetime = Options_Trade_date_Time;

%idn_price = options_trade_price;

keep %idn_datetime %idn_price;

RUN;

%MEND;

which does not work, how do I get the %idn and %strike into my code?

Also if I have sets of %idn and %strike like

b, 149

c, 148

d, 147

m, 138

I dont want to manually change the %let statements and then re-run then code, how can I run the macro over and over again, one time for each set of %idn and %strike ?

Re: macros, inserting %let strings into code

robby_beum — Tue, 01 May 2012 21:03:54 GMT

If I understand your question correctly, you'll want to do something like the following:

%macro loopmacro(idn, Strike);
%productData;
%MACRO productData;
DATA product_%idn;
set home.euro_c_%strike_1109;
     %idn_datetime = Options_Trade_date_Time;
     %idn_price = options_trade_price;
     keep %idn_datetime %idn_price;
RUN;
%MEND;

%loopmacro(b, 149);
%loopmacro(c, 148);
%loopmacro(d, 147);
...
%loopmacro(m, 138);

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:18:44 GMT

I dont understand, you have %macro twice in there but only %mend once?

how do i call this macro?

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:20:56 GMT

if i have code

%macro loopmacro(idn, Strike);

%productData;

%MACRO productData;

DATA product_%idn;

set home.euro_c_%strike_1109;

%idn_datetime = Options_Trade_date_Time;

%idn_price = options_trade_price;

keep %idn_datetime %idn_price;

RUN;

%MEND;

%loopmacro(b, 149);

%loopmacro(c, 148);

and highlight it all and hit run, I get no data sets? how do i run this thing?

Re: macros, inserting %let strings into code

robby_beum — Tue, 01 May 2012 21:22:47 GMT

Try this:

%macro loopmacro(idn, Strike);
DATA product_%idn;
     set home.euro_c_%strike_1109;
     %idn_datetime = Options_Trade_date_Time;
     %idn_price = options_trade_price;
     keep %idn_datetime %idn_price;
RUN;
%MEND;

%loopmacro(b, 149);
%loopmacro(c, 148);
%loopmacro(d, 147);
...
%loopmacro(m, 138);

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:25:33 GMT

if I run that, nothing happens, my log editor just says

119 %loopmacro(b, 149);

120 %macro loopmacro(idn, Strike);

121 DATA product_%idn;

122 set home.euro_c_%strike_1109;

123 %idn_datetime = Options_Trade_date_Time;

124 %idn_price = options_trade_price;

125 keep %idn_datetime %idn_price;

126 RUN;

127 %MEND;

128 %loopmacro(b, 149);

129 %loopmacro(c, 148);

130 %loopmacro(d, 147);

131 %loopmacro(m, 138);

but i get no data sets appearing in my work folder

Re: macros, inserting %let strings into code

robby_beum — Tue, 01 May 2012 21:32:01 GMT

You define a maco variable with a '%' but you call a macro variable with a '&'.

%macro loopmacro(idn, strike);
DATA product_&idn.;
set home.euro_c_&strike._1109;
     &idn._datetime = Options_Trade_date_Time;
     &idn._price = options_trade_price;
     keep &idn._datetime &idn._price;
RUN;
%MEND loopmacro;

%loopmacro(b, 149);
%loopmacro(c, 148);
%loopmacro(d, 147);
...
%loopmacro(m, 138);

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:37:18 GMT

I still dont understand; ive tried

&loopmacro(b,149);

&loopmacro(idn, strike);

&loopmacro;

but nothing happens, how do I call this macro?

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:40:30 GMT

%macro loopmacro(idn, Strike);

DATA product_%idn;

set home.euro_c_%strike_1109;

%idn_datetime = Options_Trade_date_Time;

%idn_price = options_trade_price;

keep %idn_datetime %idn_price;

RUN;

%MEND loopmacro;

%loopmacro(b, 149);

%loopmacro(c, 148);

%loopmacro(d, 147);

%loopmacro(m, 138);

so would

&loopmacro(b, 149);

call this macro, as I cant seem to call this thing

Re: macros, inserting %let strings into code

robby_beum — Tue, 01 May 2012 21:50:31 GMT

Reread the code - Replaced '%' with '&' inside the data step.

%loopmacro(b, 149);
%loopmacro(c, 148);
%loopmacro(d, 147);
...
%loopmacro(m, 138);

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 21:56:11 GMT

still dont understand, with the code

%macro loopmacro(idn, strike);

DATA product_&idn.;

set home.euro_c_&strike._1109;

&idn._datetime = Options_Trade_date_Time;

&idn._price = options_trade_price;

keep &idn._datetime &idn._price;

RUN;

%MEND loopmacro;

%loopmacro(b, 149);

%loopmacro(c, 148);

%loopmacro(d, 147);

I highlight a run. Now how do I call this macro? with

&loopmacro(b,149); or &loopmacro or &loopmacro(idn,strike);;

does not work

Re: macros, inserting %let strings into code

ballardw — Tue, 01 May 2012 22:14:54 GMT

The macro call would be the %loopmacro(b,149);

Try setting macro options before the call to see if you're getting resolution errors in the macro:

options symbolgen mprint;

%loopmacro(b, 149);

options nosymbolgen nomprint;

The option will put text in the LOG of the resolved macro variables and the resulting syntax.

& is for referencing macro VARIABLES, % is for calling macros and macro functions.

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 22:20:10 GMT

i tried that but what is meant to happen, i ran the code

%macro loopmacro(idn, strike);

DATA product_&idn.;

set home.euro_c_&strike._1109;

&idn._datetime = Options_Trade_date_Time;

&idn._price = options_trade_price;

keep &idn._datetime &idn._price;

RUN;

%MEND loopmacro;

and then ran

options symbolgen mprint;

%loopmacro(b, 149);

options nosymbolgen nomprint;

and the log just reads

210 %macro loopmacro(idn, strike);

211 DATA product_&idn.;

212 set home.euro_c_&strike._1109;

213 &idn._datetime = Options_Trade_date_Time;

214 &idn._price = options_trade_price;

215 keep &idn._datetime &idn._price;

216 RUN;

217 %MEND loopmacro;

218 options symbolgen mprint;

219 %loopmacro(b, 149);

220 options nosymbolgen nomprint;

but thats all, what do I infer from this?

Re: macros, inserting %let strings into code

Tom — Tue, 01 May 2012 22:29:41 GMT

Close SAS and start over with one of the later examples where the typos and missing %MEND statements have been fixed. You probably have the SAS compiler so confused by now it doesn't know whats what. So it is probably just eating every line you give it looking for what ever end symbol it needs to complete the current statement.

Here is a little guidance:

You need to DEFINE the macro BEFORE you call it. The %MACRO/%MEND pair define the macro.

To EXECUTE or CALL a macro you type it with % in front of its name. %LOOPMACRO(a,b) for example.

To EVALUATE a macro VARIABLE you reference it with an & in front of its name. &IDN for example.

(Note some people call macro variables "macros". It is best to call the variables macro variables and avoid confusion with actual macros.)

Re: macros, inserting %let strings into code

Haikuo — Tue, 01 May 2012 22:39:18 GMT

After you restart your SAS session as Tom has suggested, Try the following code:

/*This is where you store parameters supposedly*/

data list;

input a$ b$;

cards;

b 149

c 148

d 147

m 142

;

/*To get the total number of pairs of your parameter*/

data _null_;

call symput('count',nobs);

set list nobs=nobs;

stop;

run;

/*This is your core macro*/

%macro loopmacro(idn=, strike=);

DATA product_&idn.;

set home.euro_c_&strike._1109;

&idn._datetime = Options_Trade_date_Time;

&idn._price = options_trade_price;

keep &idn._datetime &idn._price;

RUN;

%MEND loopmacro;

/*This is to get your dynamic input of parameters in macro variable*/

%macro par;

data _null_;

set list;

call symputx('a'||left(_n_), a);

call symputx('b'||left(_n_),b);

run;

%mend;

%par

/*Now this is to get what you want hopefully*/

%macro final;

%do i=1 %to &count;

%loopmacro(idn=&&a&i, strike=&&b&i)

%end;

%mend;

%final

Regards,

Haikuo

Re: macros, inserting %let strings into code

skipper — Tue, 01 May 2012 22:39:28 GMT

Thank you, closing down SAS and starting over solved all the problems and the code works!!!

Thank you guys.

Re: macros, inserting %let strings into code

Haikuo — Wed, 02 May 2012 00:41:55 GMT

If you don't want to restart your SAS, here is some magic strings sometimes may work for you:

*))%*))*/;

;;;;

%mend;

options notes;

run cancel; quit;

proc unk; run;

Haikuo