You are right.
begin(1)end
doesn't qualify, by a long way, as a range acceptable
to -forval-. Stata has to be able to work out, immediately,
what number you mean by "begin" and what by "end".
Also, what goes in those positions _must_ be
constants. They cannot be variables.
A quite different issue is that I cannot
see why you want these 365 extra variables,
as they add no information to your data.
What do you want to do with them?
9 times out of 10 wanting to do this betrays
a traveller from SAS land who wants to do
something in a SAS-like way, but I would
guess happily that you do not need these
365 variables at all.
Nick
[email protected]
Maria Montez
> Here is the error message:
>
> . forvalues i=begin(1)end {
> 2. replace day`i'=1
> 3. }
> invalid syntax
> r(198);
>
> I actually tabulated both begin and end and begin goes from
> 1-364 and end
> goes from 1-365. I think I cannot use variables in defining
> where the loop
> should start and end. I did a test by writing
>
> forvalues i=begin(1)end {
> replace day5=1
> }
>
> and I get the same error.
Eric G. Wruck
> What was the syntax error? You may have gone past the 365th
> element of your
> array if you have a discharge day sometime past 1-October-2001, or
> thereabouts.
> >Hi! I'm still on v8.
> >
> >I'm looking at one year of data for which one record
> corresponds to one
> >hospitalization. I created variables day1-day365 to
> represent all the days
> >in that year. Now, I would like those variables to be equal
> to one during
> an
> >hospitalization. I have the admission day (admitday) and the
> discharge day
> >(disday) and using these, I created two variables begin and
> end that tell
> me
> >when did that hospitalization started and ended. Then I
> though that I could
> >loop from begin to end and change the day array from 0 to 1.
> However I'm
> >getting a syntax error and I think it comes from the begin and end
> variables
> >in the forvalues loop. Can anyone help me?
> >
> >sample code:
> >
> >forvalues i=1(1)365 {
> > gen day`i'=0
> >}
> >
> >gen begin=admitday-mdy(10,1,2000)+1
> >replace begin=1 if begin<=0
> >
> >gen end=disday-mdy(10,1,2000)+1
> >
> >forvalues i=begin(1)end {
> > replace day`i'=1
> >}
> >
> >sample data:
> >
> >
> +--------------------------------------------------------------+
> > | study_id admitday disday begin end
> day1 day2 |
> >
> |--------------------------------------------------------------|
> > 1. | 19 03jan2001 24jan2001 95 116
> 0 0 |
> > 2. | 362 24may2001 29may2001 236 241
> 0 0 |
> > 3. | 396 01jun2001 07jun2001 244 250
> 0 0 |
> > 4. | 436 21mar2001 22mar2001 172 173
> 0 0 |
> > 5. | 438 17jan2001 25jan2001 109 117
> 0 0 |
> >
> |--------------------------------------------------------------|
> > 6. | 517 06mar2001 21mar2001 157 172
> 0 0 |
> > 7. | 517 11sep2001 17sep2001 346 352
> 0 0 |
> > 8. | 590 16sep2001 17sep2001 351 352
> 0 0 |
> > 9. | 879 20dec2000 22dec2000 81 83
> 0 0 |
> >
> +--------------------------------------------------------------+
>
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