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st: RE: Reshape problem
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: Reshape problem
Date
Thu, 3 Nov 2011 12:35:58 +0000
This is still a -reshape long-. (Some people talk about "long long".) Looks like
reshape long V, i(Unit Time) <etc.>
followed by clean-up as appropriate.
There is discussion within
http://www.stata.com/support/faqs/data/reshape3.html
Nick
[email protected]
Johan Hellström
I have a dataset that is in long form (containing a lot of variables), but some variables (v1-v34 in the example below) are measured at a different level and stored in wide form. That is, it is the same variable for different sub-units. These also contain a lot of empty cells. Does anyone know a way to create a new panel where all "wide form"-variables (V1-V34) is coverted into long form (and the values stored in a 'New-variable'). The example below gives an indication of how my dataset looks like. For each 'Unit' it is about 10-25 measurement points over time (unbalanced panel).
Old panel:
----------------------------------------------------------------------------------------------------------------------------------------------------
Unit Time x1 V1 V2 V3 V4 ... v34
1 1 12.3 . 67 26 48 ... 23
1 2 26.6 45 34 12 . ... 64
...
2 1 84.0 83 . . 23 ... 87
2 2 23.5 . . 91 82 ... 98
...
----------------------------------------------------------------------------------------------------------------------------------------------------
New panel:
-----------------------------------------------------------------------------------------------------
Unit Sub-unit Time x1 New-variable
1 1 1 12.3 .
1 2 1 12.3 67
1 3 1 12.3 26
1 4 1 12.3 48
...
1 34 1 12.3 23
1 1 2 26.6 45
1 2 2 26.6 34
1 3 2 26.6 12
1 4 2 26.6 .
...
2 1 1 84.0 83
2 2 1 84.0 .
2 3 1 84.0 .
2 4 1 84.0 23
...
2 34 1 84.0 87
2 1 2 23.5 83
Etc.
------------------------------------------------------------------------------------------------------
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