topic Re: add prefix to observations in SAS Programming

add prefix to observations

pandhandj — Fri, 16 Sep 2016 08:58:31 GMT

I am sure this is very simple guys, but i am struggling.

i have a data set with 1 variable (numeric), its 10 digits long.

I need to at the same prefix to all observations (around 130,000 in total)

the prefix is numeric and is 4 digits long.

so,

have: 1234567890

want: 22221234567890

apologies if i am missing something obvious, but it has been an awfully long week so far...

thanks,

paul

Re: add prefix to observations

RW9 — Fri, 16 Sep 2016 09:12:23 GMT

Well, if they are all 10 and you want the 2222, then you can just do:

value=value + 22220000000000;

I think I got the right number of zeroes there - adjust as per your testing 🐵

Alternatively if they are not all 10, then its probably simpler to convert to text, append then convert back to number:
value=put(cats("2222",input(value,best.),best.);

Re: add prefix to observations

Oligolas — Fri, 16 Sep 2016 09:23:34 GMT

Hi,

if you always have 10 digits, you could simply add 22220000000000 to your value.

if not, you can convert it to char, add the prefix and reconvert to numeric, like this:

data have;
   var=1234567890;
run;
data want;
   length want1 want2 8;
   set have;
   want1=var+22220000000000;
   want2=input('2222'||strip(put(var,best31.)),best31.);
   format want1 want2 16.;
run;

Cheers

Re: add prefix to observations

pandhandj — Fri, 16 Sep 2016 09:36:38 GMT

Guys, thanks for the responses.

my apologies, but i have just realized that my observations are actually Character format, sorry.

i cant get your suggestions to work and i think this is why. Could you rethink please?

thanks again.

Re: add prefix to observations

Peter_C — Fri, 16 Sep 2016 09:41:22 GMT

that is called concatention

Have a look at the CATx functions (where x could be X S T or not present)

As stated you might want

new_string = cats( '222', old_string ) ;

Re: add prefix to observations

Oligolas — Fri, 16 Sep 2016 09:42:53 GMT

data have;
   length var $10;
   var='1234567890';
run;
data want(rename=(var2=var));
   length var2 $14;
   set have;
   var2=cats('2222',var);
   drop var;
run;

Re: add prefix to observations

pandhandj — Fri, 16 Sep 2016 09:49:59 GMT

thanks to all...I'm cooking with gas now 🙂

Re: add prefix to observations

Ksharp — Sat, 17 Sep 2016 04:05:13 GMT

If you want numeric variable be that, try PICTURE:



proc format;
picture fmt
 low-high='00000000000000' (prefix='2222');
run;
data have;
have=1234567890;
format have fmt.;
run;