Suppose you have a variable that contains leading zeros. You wish to eliminate leading 0s from the variable in SAS.
Example
The following program creates a sample dataset which would be used to demonstrate the trick to remove leading zeros in SAS.
data abc;
input a $;
cards;
0002255
0074
03567
000ABCD9
00ZAB74
;
run;
SAS : Remove Leading Zeros in SAS
data abc;The function PRXCHANGE() is used to perform pattern matching replacement. The pattern specified in PRXCHANGE function is a regex language,
set abc;
b = 1 * a;
c = prxchange('s/^0+//o',-1,a);
run;
Output
The output is shown in the image below -
Remove leading zeros in SAS |
Important Points
- As shown above, variable b contains only numeric values. It means if you know you have only numeric values but with leading zeros, you can simply multiply the variable by 1 to convert it to numeric which would automatically get rid of leading zeros,
- Variable c contains all the values after removing leading zeros. This trick is more robust as it takes care of both character and numeric values with leading zeros.
thank you for this.
ReplyDeleteplease explain prxchange('s/^0+//o',-1,a)
ReplyDeleteYes, could you please brief the formula used...
ReplyDelete
ReplyDeletehi sr,
I have a real time scenario
I have a dataset with the following info
emp_id currency$
1234 USD
1289 USD
1389 INR
1456 INR,USD
1567 USD,GBP,INR
I need ouput like this
e_id currency$
1234 USD
1234 USD
1289 USD
1389 INR
1456 INR
1456 USD
1567 USD
1567 GBP
1567 INR
1567 INR
how to do it,please help me
U can use scan function for doing this by creating a macro that will check for delimiter
DeleteThis also works...
Deletedata dac;
set abc;
b= compress(a,'0');
proc print
run;
Nope, doesn't work if the number has zeroes in other places
DeleteHi,
ReplyDeleteCan you please explain the pattern you have written to remove leading zeroes.