This dataset has brought a question to my mind.
I want to do : -
egen j=group(var) BUT I do not want the group to SORT var, I only want
consecutive groups to have the same value for j ( this is what is
needed in the original question )
for example I would want the FIRST paired occurance of diathermy[2] to
be ONE group and the 2nd paired occurance of diathermy[2] to be
another group.
How would I do that ?
Here is a long way to do it!
egen j1=group(var1)
gen j2=_n
gen j3=j2
replace j3=j3[_n-1] if j1==j1[_n-1]
And then I would have the same group number j3 for same consecutive
items in var1. but I guess someone would have a variant of -egen
group- which DOES NOT do sorting?
Any comments ?
Thank you,
Ashim.
On Tue, Jan 6, 2009 at 6:20 PM, Ashim Kapoor <[email protected]> wrote:
> I would do: -
>
> Suppose your variable is called var
>
>
> gen j=var
> replace j="diathermy[1]" if j[_n+1]=="diathermy[2]" & j=="diathermy[2]"
>
> Then j would have what you want.
>
> I think this should do it.
>
> Thank you,
> Ashim.
>
> ue, Jan 6, 2009 at 1:22 PM, b. water <[email protected]> wrote:
>> dear all,
>>
>> stata 8.2 xp pro,
>>
>> i have a var like this:
>>
>> monopolar
>> bipolar
>> bipolar
>> bipolar
>> monopolar
>> nodiathrm
>> diathermy[2]
>> diathermy[2]
>> bipolar
>> monopolar
>> diathermy[2]
>> diathermy[2]
>> .
>> . <- denotes missing
>> .
>> monopolar
>> diathermy[2]
>> diathermy[2]
>> .
>> .
>>
>> what i want to achieve is for every first encountered diathermy[2] to be changed to diathermy[1], while leaving the second occurence as diathermy[2]. is this possible in stata? if it can be done, would appreciate advice/help on how to achieve it.
>>
>> thank you,
>> bw
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