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| From | "Martin Weiss" <martin.weiss1@gmx.de> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | st: RE: reshape command ---listing all the variables changing over time? |
| Date | Thu, 13 May 2010 23:44:57 +0200 |
<> *********** ssc d panels *********** may be helpful to check for constant variables within panels. What kind of dataset is it that features 1,500 variables that you want to -reshape- to wide? I would say that this is not a normal situation when applying the -reshape- command. You will end up with a dataset with slightly more than 1,500*(number of distinct values of j) variables. Is that really intended? Stata is fond of the "long" format for most analyses... HTH Martin -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Amanda Fu Sent: Donnerstag, 13. Mai 2010 21:57 To: statalist@hsphsun2.harvard.edu Subject: st:reshape command ---listing all the variables changing over time? Hi all, 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? Thanks for your time! Sincerely, Mandy * * 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/