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Re: st: Change variable
From
Ay <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Change variable
Date
Thu, 15 Sep 2011 23:25:10 +1000
Dear Robson,
Thank you for replying.
I've tried m:1, it showed that ...is not unique id.
When i check it using isid, file1 includes educlevel as unique id. Hence, there would be the same child with different educlevel. So, this child has 2 obs in the file1.
Actually, the child (id2) does not mean the number of child in the household, but number of respondent.
I have searched online about this, but still does not get an answer.
Thank you,
Yun
On 15 Sep 2011, at 22:06, Robson Glasscock <[email protected]> wrote:
> Hi Ay,
>
> No need for an apology. This is a m:1 merge using household(id1) and
> child(id2).
>
> Sort File 1 on household and child. Save it.
> Sort File 2 on household. Save it.
>
> Go into file_1 and type:
>
> merge m:1 household child using File_2.dta
>
> Note that it looks to me from the data you provided that household 2
> has child 4 and child 3 in File 1, but File 2 only has child 1. Also,
> household 3 in File 1 has child 5, but household 3 in File 2 has child
> 2. These will show up as observations where _merge != 3 after you
> merge the files.
>
> best,
> Robson Glasscock
>
> On Thu, Sep 15, 2011 at 6:02 AM, Ay <[email protected]> wrote:
>> Dear Robson,
>>
>> My apologize about my unclear question.
>>
>> I try to list the variables and data in rows rather than in colomn.
>>
>> File 1
>> Household(id1)->
>> 1, 1, 1, 2, 2, 2, 3, ...
>>
>> Child(id2)->
>> 2, 2, 3, 4, 3, 3, 5, ...
>>
>> Educlevel->
>> 2, 1, 1, 2, 2, 1, 1, ...
>>
>> X3(schooltype)->
>> a, b, a, b, a, a, b, ...
>>
>> X4(repetition)
>> 2, 2, 2, 2, 2, 2, 2, ...
>>
>> Educlevel in strings.
>> Educlevel=1 is primary school.
>> Educlevel=2 is secondary level.
>> A child may have secondary level and thus have records for his primary level along with other variables in file1.
>>
>>
>> File 2
>> Household(id1)->
>> 1, 2, 3, ...
>>
>> Child(id2)->
>> 3, 1, 2, ...
>>
>> X3(ethnicity)
>> 1, 3, 2, ...
>>
>> X4(livings)->
>> 1, 2, 2, ...
>>
>> In file 2 only single obs.
>>
>> I hope this is clearer.
>>
>> Thank you.
>>
>> Regards,
>>
>> Yun
>>
>>
>> On 11 Sep 2011, at 01:53, Robson Glasscock <[email protected]> wrote:
>>
>>> So File 1 is a panel data set that records each individual's
>>> educational level over time? If that is the case, and if File 2 is
>>> also panel data, then a 1:1 merge based on x1(unique id) and x3(time
>>> period) could be done.
>>>
>>> If File 2 is not panel data, then you're looking at a m:1 merge based
>>> on x1(unique id).
>>>
>>> If this doesn't solve the problem, I think you should include an
>>> example of the observations in each of your files on your next post.
>>> I'm still struggling a bit to picture the contents of your files.
>>>
>>> On Sat, Sep 10, 2011 at 9:20 AM, Ay <[email protected]> wrote:
>>>> Dear Robson,
>>>>
>>>> Thank you for replying.
>>>>
>>>> Actually,
>>>> File 1:
>>>> x1 (unique id)
>>>> x2 (educational level)
>>>>
>>>> File 2
>>>> x1 (unique id)
>>>>
>>>>
>>>> In file 2, x1 & x2 together are unique id. All of the variables are in strings.
>>>>
>>>> I could not merge file1 and file 2 since x2 is the educational level in which an individual would have more than 1 level/type.
>>>>
>>>> Thank you,
>>>>
>>>> Yun
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 10 Sep 2011, at 22:56, Robson Glasscock <[email protected]> wrote:
>>>>
>>>>> I'm having a hard time understanding the structure of your "first
>>>>> file" and your "second file. Do your files looks like this:
>>>>>
>>>>> File 1:
>>>>> x1
>>>>> (unique id + educational level)
>>>>>
>>>>> File 2:
>>>>> x1
>>>>> (unique id)
>>>>>
>>>>> so that File 1 contains a concatenated variable?
>>>>>
>>>>> If File 1 has one variable, x1, that is concatenated, then I don't
>>>>> think you need to merge the files together to get what you want. You
>>>>> would just need to split x1(unique id + educational level) into
>>>>> x1(unique id) and x2(educational level). The substr function may be
>>>>> used to do this.
>>>>>
>>>>> -help substr-
>>>>>
>>>>> best,
>>>>> Robson Glasscock
>>>>>
>>>>> On Fri, Sep 9, 2011 at 5:27 PM, Ay <[email protected]> wrote:
>>>>>>
>>>>>> I am using stata 11.0
>>>>>>
>>>>>> How can i generate or change a variable that contains for instance, educational level or father and mother as 'Type'?
>>>>>> The variables are in strings format.
>>>>>>
>>>>>> The reason i am asking this question is that, i want to merge these 'type' variable (var B) with other variable.
>>>>>> I could not do this since the second file only has variable A as individual id variable. While in the first file, it has var A and var B ('type' or level variable) as unique Id.
>>>>>>
>>>>>> If anyone knows other ways besides generating the type variable before merging, I really appreciate it.
>>>>>>
>>>>>> Variable a
>>>>>> 1,2,1,1,2,3,3
>>>>>>
>>>>>> Variable b(type)
>>>>>> A,A,B,C,B,C,A
>>>>>>
>>>>>> Many thanks.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Yun
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> *
>>>>>> * 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/
>>>>>
>>>>> *
>>>>> * 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/
>>>>
>>>> *
>>>> * 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/
>>>>
>>>
>>> *
>>> * 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/
>>
>> *
>> * 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/
>>
>
> *
> * 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/
*
* For searches and help try:
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