substring from the right

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substring from the right

Hi,  is there a quick way to substring from the right but skip a few digits.

If I have 2345001  I want to get 2345 .. I want to only remove the last 3 digits...  the length of the field is not uniform, soucl be 8 digits or 10 or 9, etc.  but th eonly thing sore sure is that I want to remove the last 3 digits..  Thanks

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‎04-02-2014 02:51 PM
Super User
Posts: 3,198

Re: substring from the right

myStr =  substr(myStr, 1, length(myStr) - 3);

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‎04-02-2014 02:51 PM
Super User
Posts: 3,198

Re: substring from the right

myStr =  substr(myStr, 1, length(myStr) - 3);

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Occasional Contributor
Posts: 12

Re: substring from the right

Another approach in these sorts of situations is to use the substring function with the reverse function

mystr =  reverse(substr(strip(reverse(mystr)),4));

Respected Advisor
Respected Advisor
Posts: 4,849

Re: substring from the right

Is your variable a number or a character string?

137  data _null_;

138    x=2345001 ;

139    y=int(x/1000);

140    put x= y=;

141  run;

x=2345001 y=2345

Valued Guide
Posts: 2,904

Re: substring from the right

The more, the merrier:

data _null_;

  mystr="2345001";

  new_str=prxchange('s/(^\w+)(\w{3}$)/$1/',-1,strip(mystr));

  put mystr= new_str=;

run;

Haikuo

Super User
Posts: 3,198

Re: substring from the right

The simpler, the better :smileysilly:

data _null_;

  mystr="  2345001     ";

  new_str = prxchange('s/\d{3}\s*$//', 1, mystr);

  put mystr= new_str=;

run;

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Valued Guide
Posts: 2,904

Re: substring from the right

Better indeed!

Haikuo

Occasional Contributor
Posts: 12

Re: substring from the right

Might be better use of prxchange, but not exactly readable nor intuitively obvious what the code is doing.

I'd want a comment explaining what was being done and why so that my BAU support junior could understand what the code was doing.

Super User
Posts: 3,198

Re: substring from the right

It reads: Replace (s) a succession of exactly 3 ({3}) digits (\d) followed by any amount (*) of white space (\s) and occuring at the end of the string ($) with nothing(//). Do this only once.

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