To know for sure , I would do a group without sorting , and then by
this new group I would pick out the 1st one and I could figure out the
size of each group by gen n=_n by this new kind of group.
Thank you,
Ashim.
On Wed, Jan 7, 2009 at 8:21 AM, Steven Samuels <[email protected]> wrote:
> I see why you thought that. BW implied that it did come in pairs. Perhaps it
> should, but I'm not sure how he can know that it does.
>
> -Steve
> On Jan 6, 2009, at 9:45 PM, Ashim Kapoor wrote:
>
>> ahhhh I see. I was thinking diathermy only occured in pairs and that
>> I could assume that.
>>
>> Thank you,
>> Ashim.
>>
>> On Wed, Jan 7, 2009 at 7:38 AM, Steven Samuels <[email protected]>
>> wrote:
>>>
>>> It will not uniquely identify the first occurrence 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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>>>>>>
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>>>>>
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