How about, at the beginning of your do-file:
local iff "duration==1 & num==1"
...
list r1 se1 r2 se2 if `iff' & outcome=="pregnancy"
etc., which means you have to change duration only in one line.
Or, you can do a loop and do it for many different levels of duration
at the same time:
foreach d of numlist 1 2 4 6/11 {
list r1 se1 r2 se2 if duration==`d' & outcome =="pregnancy" &num==1
... if duration==`d'
}
Or you could write yourself a little program/do-file that takes
duration as an argument. But do not confuse the if qualifier with the
-if- programming command:
http://www.stata.com/support/faqs/lang/ifqualifier.html
Hope this helps.
2008/9/29 Paul O'Brien <[email protected]>:
> i have a sequence of commands, each of which has included: duration==1.
>
> such as:
> list r1 se1 r2 se2 if duration==1 & outcome =="pregnancy" &num==1
> metan logrr selogrr if num==1 &outcome=="pregnancy" &duration==1, fixed
> eform nograph
> swapval iud1 iud2 if duration=1 &num==1
> ...
>
> i need to change the duration frequently and have to change all the commands
> each time.
>
> is there a way to put all the commands together so i can change the duration
> just once every time i run the sequence?
>
> i have looked at foreach and forvalues.
>
> thanks
>
> -------------------------------
> Dr Paul O'Brien
> Raymede Clinic
> Westside Contraceptive Services
> Westminster Primary Care Trust
> Exmoor St
> London
> W10 6DZ
> UK
> 44 + (0)20 8962 4450
>
>
>
>
>
>
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