Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: RE: RE: reshape command ---listing all the variables changing over time?
From
"Nick Cox" <[email protected]>
To
<[email protected]>
Subject
st: RE: RE: reshape command ---listing all the variables changing over time?
Date
Fri, 14 May 2010 11:57:05 +0100
In addition, your -reshape- example is puzzling. -reshape- expects
stubs, not variable names.
Nick
[email protected]
Nick Cox
In addition to other replies
findname, all(@ == @[1])
finds all variables which are constant; adding its -not- option finds
the complement. You can specify a varlist too to separate constant and
changing variables. The syntax catches numeric and string variables
alike.
-findname- is a user-written program from SSC.
Amanda Fu
I was wondering if anyone could help me with a problem I met when
using --reshape--command.
When I tried to reshape a data set from long version to wide version,
I find I need to list all the variables that are not constant in the
--reshape--command. Suppose the data set has 1500 variables changing
over time and 100 constant variables.
------------------------------------------------------------
. reshape wide x1-x1500, i(id) j(wave)
------------------------------------------------------------
If I miss any of the variables changing over time, the reshape command
will give error message such as "variable XXXX not constant " and will
stop working. But it is so frustrating to separate the constant
variables and not-constant variables and list all of the latter ones
in the reshape command.
What I used to do is just to drop all the unnecessary variables from
the data set before reshape to reduce the work load here.
May I know if there is any more efficient way to deal with this problem?
*
* 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/