Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: egen with user-defined function
From
Jan Barendregt <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: egen with user-defined function
Date
Tue, 20 Aug 2013 04:01:36 +0000
Thanks a lot Nick: I tried your code and it worked a charm.
Cheers,
Jan
------------------------------------------
Jan J Barendregt, MA, PhD
Assoc Prof of Epidemiological Modelling
School of Population Health, University of Queensland
Email: [email protected]
Skype: janbarendregt
Phone: +61 7 3102 3093
Visit www.epigear.com: home of Ersatz, MetaXL, DisMod II, Prevent, and more!
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Nick Cox
> Sent: Tuesday, 20 August 2013 10:41 AM
> To: [email protected]
> Subject: Re: st: egen with user-defined function
>
> I don't see quite what -egen- is objecting to here but you have more
> fundamental problems.
>
> Wiring in particular names to a program is not illegal but it usually
> implies that you are pitching your problem at the wrong level.
>
> (*) I guess that you have some variable -RECORD_AXIS_DATA- and you are
> looking for occurrences of the strings "A410" ... "A419".
>
> Your code would at most look in the first observation as you are using
> the -if- command
> instead of an -if- qualifier.
>
> It would be probably be best if you described the concrete problem, as
> my strong guess is that no original program is needed here.
>
> But I'll guess that (*) is the nub of the problem.
>
> clonevar copy = RECORD_AXIS_DATA
>
> qui forval i = 0/9 {
> replace copy = subinstr(copy, "A41`i'", "", .)
> }
>
> gen count = (length(RECORD_AXIS_DATA) - length(copy)) / 4
>
> So in a copy of the variable we replace each occurrence of "A410"
> "A411" ... "A419" with an empty string. Each such deletion reduces the
> number of characters by 4.
>
> This was written up in
> http://www.stata-journal.com/article.html?article=dm0056
>
>
> Nick
> [email protected]
>
>
> On 20 August 2013 01:03, Jan Barendregt
> <[email protected]> wrote:
>
> > I'm trying to let egen to use a user-defined function. Here
> is what I'm doing:
> >
> > do "C:\Ddrive\MattCooper\Data\test.do"
> >
> > . capture program drop _grecordparse
> >
> > . program define _grecordparse
> > 1. local bool=0
> > 2. local li=1
> > 3. local i=0
> > 4. while `i' < RECORD_AXIS_COUNT {
> > 5. if (substr(RECORD_AXIS_DATA,`li',4)>="A410") &
> (substr(RECORD_AXIS_DATA,`li',4)<="A419") local bool=
> >> `bool'+1
> > 6. local li=`li'+4
> > 7. local i=`i'+1
> > 8. }
> > 9. gen `typlist' `varlist' = `bool'
> > 10. end
> >
> > .
> > end of do-file
> >
> > . egen sepsis=recordparse
> > unknown egen function recordparse()
> > r(133);
> >
> >
> > So I can't get egen to recognise my recordparse function. Any ideas?
> >
> > I'm using Stata 11.2 on Windows
> >
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/faqs/resources/statalist-faq/
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/