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Re: st: -reshape- and variable names involving zero (0)
From
Richard Williams <[email protected]>
To
[email protected], Stata Help <[email protected]>
Subject
Re: st: -reshape- and variable names involving zero (0)
Date
Sun, 27 Oct 2013 17:26:44 -0500
At 03:43 PM 10/27/2013, Roberto Ferrer wrote:
This derived from
http://www.stata.com/statalist/archive/2013-10/msg00949.html
The following does not give the result I would expect:
*------------------------ begin code ----------------------------------------
clear
input id str4 ticker str20 type return06 return07 return08
1 "ABCB" "formation" 0.01 0.2 0.3
2 "AEDU" "formation" 0.02 0.4 0.5
3 "AMBV" "formation" 0.01 0.2 0.3
1 "ABCB" "buysell" 0.01 0.2 0.3
2 "AEDU" "buysell" 0.01 0.2 0.3
3 "AMBV" "buysell" 0.01 0.2 0.3
1 "ABCB" "holding" 0.01 0.2 0.3
2 "AEDU" "holding" 0.01 0.2 0.3
3 "AMBV" "holding" 0.01 0.2 0.3
end
reshape long return, i(id type) j(period)
list
*--------------------- end code
------------------------------------------------
In the output I can see:
xij variables:
return6 return7 return8 -> return
which I believe should be:
return06 return07 return08
Notice the zeros are cropped out.
If I rename return06, return07, return08 to
return16, return17, return18, the code returns what I expect.
What am I missing? What's the problem with the original names
and -reshape- ?
You also get this warning message:
. reshape long return, i(id type) j(period)
(note: j = 6 7 8)
(note: return6 not found)
(note: return7 not found)
(note: return8 not found)
I think Stata just doesn't like leading zeroes in the names. I can
see where leading zeros would be a problem. Suppose you had both
return6 and return06 in your data. What is Stata supposed to do with them?
Somebody else may correct me, but I think you just need to avoid
leading zeros in your variable names, e.g. rename your vars return6,
return7 and return8. It works fine for me when I do that.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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