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Re: st: string variable question
From
Eric Booth <[email protected]>
To
[email protected]
Subject
Re: st: string variable question
Date
Mon, 29 Mar 2010 09:04:45 -0500
>
I'm still not sure what your data look like, but I think you are just asking how to create a row id (e.g. gen idvar = [_n] ),
so for the earlier example:
*****
clear
inp A1 A2
1 2
2 3
3 4
5 6
end
g brand = string(A1) + "-" + string(A2) // <--**use Martin's solution to avoid destringing later for -mds-
g brand_id = _n
**if you've got multiple rows of the same brand,
***you can create the brand_id with something like:
*egen brand_id = group(brand)
order brand*
**mds works with the string or numeric brand id**
mds A1 A2, id(brand_id) std dim(1) addc noplot
mds A1 A2, id(brand) std dim(1) addc noplot
******
~ Eric
__
Eric A. Booth
Public Policy Research Institute
Texas A&M University
[email protected]
Office: +979.845.6754
On Mar 29, 2010, at 8:49 AM, Data Analytics Corp. wrote:
> Hi,
>
> Thanks, but this is not quite there. A1 and A2 are numeric variables while brand just identifies the rows. A1 and A2 actually come from an MDS.
>
> Thanks,
>
> Walt
>
>
> Eric Booth wrote:
>>
>> Use -tostring- to combine the numeric vars, ex:
>>
>> *****
>> clear
>> inp A1 A2
>> 1 2
>> 2 3
>> 3 4
>> 5 6
>> end
>>
>> tostring A1 A2, replace
>> gen brand = A1 + A2
>> *****
>>
>> ~ Eric
>> __
>> Eric A. Booth
>> Public Policy Research Institute
>> Texas A&M University
>> [email protected]
>> Office: +979.845.6754
>>
>>
>>
>> On Mar 29, 2010, at 8:32 AM, Data Analytics Corp. wrote:
>>
>>
>>> Hi,
>>>
>>> I have two numeric variables in a Stata dataset: A1 and A2. Each has 26 elements. I want to create a third variable, brand, as part of a do program that has 26 brand names. I tried
>>>
>>> gen str brand = "A" "B" and so on to "Z"
>>>
>>> but that didn't work. How can I create a brand variable?
>>>
>>> Thanks,
>>>
>>> Walt
>>>
>>>
>>>
>>> --
>>> ________________________
>>>
>>> Walter R. Paczkowski, Ph.D.
>>> Data Analytics Corp.
>>> 44 Hamilton Lane
>>> Plainsboro, NJ 08536
>>> ________________________
>>> (V) 609-936-8999
>>> (F) 609-936-3733
>>> [email protected]
>>> www.dataanalyticscorp.com
>>>
>>> *
>>> * 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/
>>
>>
>
>
> --
> ________________________
>
> Walter R. Paczkowski, Ph.D.
> Data Analytics Corp.
> 44 Hamilton Lane
> Plainsboro, NJ 08536
> ________________________
> (V) 609-936-8999
> (F) 609-936-3733
> [email protected]
> www.dataanalyticscorp.com
>
> *
> * 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/