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Help with prxchange

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Help with prxchange

I have a dataset with a char variable containing the following example values:

AA1

AA2a

AA10

AA11a

BB3

BB3b

BB10

BB11b

 

Essentially I want to zero-pad the numeric part of each value (e.g. 'AA2a' becomes 'AA02a') and thought the prxchange function would be a quick and simple way of achieving this.  However, the problem I have run into is how to reference the zero in the replacement text.

So far the code is similar to:

var2 = prxchange('s/^(\w{2})(\d{1})(\D?)$/$1$2$3/', -1, trim(var1));

 

How do I reference (and delimit) the zero character in the replacement string of the prxchange function ($1 ->0<- $2$3)?


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‎08-31-2017 09:53 AM
New Contributor
Posts: 3

Re: Help with prxchange

Never mind, I've managed to find the solution whilst scrawling the interweb! Smiley Very Happy

 

For those that are interested... use the perl metacharacter \Q which escapes all non-word characters.

 

So, the code becomes:

var2 = prxchange('s/^(\w{2})(\d{1})(\D?)$/$1\Q0$2$3/', -1, trim(var1));

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Solution
‎08-31-2017 09:53 AM
New Contributor
Posts: 3

Re: Help with prxchange

Never mind, I've managed to find the solution whilst scrawling the interweb! Smiley Very Happy

 

For those that are interested... use the perl metacharacter \Q which escapes all non-word characters.

 

So, the code becomes:

var2 = prxchange('s/^(\w{2})(\d{1})(\D?)$/$1\Q0$2$3/', -1, trim(var1));

Super User
Posts: 10,028

Re: Help with prxchange

data have;
input x $;
y=prxchange('s/^([a-z]+)(\d)([a-z]*)$/\10\2\3/i',1,strip(x));
cards;
AA1
AA2a
AA10
AA11a
BB3
BB3b
BB10
BB11b
;
run;
New Contributor
Posts: 3

Re: Help with prxchange

Thanks for the reply Ksharp but your proposal wouldn't work as the prxchange function would look for the input buffer "\10".

Super User
Posts: 10,028

Re: Help with prxchange

But there are only three buffer.
Did you run my code and see the output?

or try   $10


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