For that matter, it won't find singletons either.
-Steve
On Jan 6, 2009, at 9:08 PM, Steven Samuels wrote:
>
> It will not uniquely identify the first occurrence if there are
> triplets or longer runs. How would an analyst know there are none?
>
> -Steve
>
>
> On Jan 6, 2009, at 8:00 PM, Ashim Kapoor wrote:
>
>> i think it does identify the first occurance,
>> here is the output
>>
>>
>> +---------------------------------------------+
>> | var1 j |
>> |---------------------------------------------|
>> 1. | monopolar monopolar |
>> 2. | bipolar bipolar |
>> 3. | bipolar bipolar |
>> 4. | bipolar bipolar |
>> 5. | monopolar monopolar |
>> |---------------------------------------------|
>> 6. | nodiathrm nodiathrm |
>> 7. | diathermy[2] diathermy[1] |
>> 8. | diathermy[2] diathermy[2] |
>> 9. | bipolar bipolar |
>> 10. | monopolar monopolar |
>> |---------------------------------------------|
>> 11. | diathermy[2] diathermy[1] |
>> 12. | diathermy[2] diathermy[2] |
>> 13. | . . |
>> 14. | . <- denotes missing . <- denotes missing |
>> 15. | . . |
>> |---------------------------------------------|
>> 16. | monopolar monopolar |
>> 17. | diathermy[2] diathermy[1] |
>> 18. | diathermy[2] diathermy[2] |
>> 19. | . . |
>> 20. | . . |
>> +---------------------------------------------+
>>
>> no ??
>>
>> 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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>>>> *
>>>> * For searches and help try:
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>>>>
>>>
>> *
>> * For searches and help try:
>> * http://www.stata.com/help.cgi?search
>> * http://www.stata.com/support/statalist/faq
>> * http://www.ats.ucla.edu/stat/stata/
>
Steven Samuels
845-246-0774
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Saugerties, NY 12477
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*
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