Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: wide to long form


From   Shehzad Ali <drshehzad_ali@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: wide to long form
Date   Fri, 4 Dec 2009 14:02:26 -0800 (PST)

Hi listers,

I would really appreciate some help with data structuring.

I want to change my data structure from wide to long form. The data comes from a discrete choice experiment. Each individual is given 6 choice sets. Each choice set has two options, A or B. Individual is asked to choose between A and B for each choice set. The data currently looks like this:

id    choice_set1    choice_set2    choice_set3    choice_set4    choice_set5    choice_set6
1            A                    B                  A                    A                    B                    B
2            B                    B                  A                    B                    A                    B

I want the data to look like this:

id    choice_set    alternative    chosen (yes/no)
1            1                A                    1
1            1                B                    0
1            2                A                    0
1            2                B                    1
1            3                A                    1
1            3                B                    0
..
..
2            1                A                    0
2            1                B                    1
2            2                A                    0
2            2                B                    1
...
...

Any help would be greatly appreciated.
Many thanks,
Shehzad


      



*
*   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/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index