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From |
Johannes Geyer <JGeyer@diw.de> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: converting a local of variable names in string variables |

Date |
Tue, 26 Feb 2008 15:05:05 +0100 |

I do not know why my code did not work but I guess I did something the function string() is not designed for. Instead I tried something different with word() and that works perfectly: ********************** use data1, clear qui ds local x "`r(varlist)'" qui d local y "`r(k)'" di `y' set obs `y' gen str61 typ = "" tokenize "`x'" forvalues no = 1/`y' { di "`1'" replace typ = word("`1'",1) in `no' mac shift } ********************** Johannes ---------------------- Johannes Geyer Deutsches Institut für Wirtschaftsforschung (DIW Berlin) German Institute for Economic Research Department of Public Economics DIW Berlin Mohrenstraße 58 10117 Berlin Tel: +49-30-89789-258 Johannes Geyer <JGeyer@diw.de> Gesendet von: owner-statalist@hsphsun2.harvard.edu 26/02/2008 11:21 Bitte antworten an statalist@hsphsun2.harvard.edu An statalist@hsphsun2.harvard.edu Kopie Thema Re: st: converting a local of variable names in string variables Thank you Sarah! I was not aware of -sxpose- which is a nice tool. However, it does not exactly do what I am looking for. When I transpose the data I loose their names - the option firstnames does something else. I still try to convert variable names to variables which I thought to be a less confusing problem. When I first used -sxpose- I had dropped all observations before. This resulted in the error message "sxpose would create new variables _var1-_var0, but names already in use" and this was caused by having no observations to be transposed. Once again, I tried the following: **************** use data1.dta, clear /* no observations, only variable names */ qui ds local x "`r(varlist)'" qui d local y = `r(k)' di `y' set obs `y' gen str61 typ = "" forvalues no = 1/`y' { local n = `n' + 1 local Q: word `n' of `x' di "`Q'" replace typ = string(`Q') in `n' } **************** what it does is the following: the variable -typ- contains missing values since I dropped all observations and Stata simply looks for data entries in variables. However, all I wanted is one variable with variable names as observations. I fear and hope that I make it too complicated - do you have any suggestion? Thank you, Johannes ---------------------- Johannes Geyer Deutsches Institut für Wirtschaftsforschung (DIW Berlin) German Institute for Economic Research Department of Public Economics DIW Berlin Mohrenstraße 58 10117 Berlin Tel: +49-30-89789-258 "Sarah Cohodes" <sarah.cohodes@gmail.com> Gesendet von: owner-statalist@hsphsun2.harvard.edu 25/02/2008 16:52 Bitte antworten an statalist@hsphsun2.harvard.edu An statalist@hsphsun2.harvard.edu Kopie Thema Re: st: converting a local of variable names in string variables Hi Johannes, Try the user installed module -sxpose- by Nick Cox (see: http://econpapers.repec.org/software/bocbocode/s446402.htm) if you want to transpose your dataset with string variables. To install, type: ssc install sxpose Then you can merge on your ID using -merge-; it doesn't matter if the identification variable you use is string or not. Good luck, Sarah On Mon, Feb 25, 2008 at 10:14 AM, Johannes Geyer <JGeyer@diw.de> wrote: > Dear Statalist, > > I am trying to match a data set of variable idenfifiers (data1) and a data > set that consists of these variables (data2). > > data1: > > var id v1 v2 v3 > 1 jk12 kk14 lk16 > 2 jk24 kk67 lk90 > 3 jk16 > .. > > data2: > > obs id jk12 jk24 jk16 > 1 12000 56 1 > 2 12000 71 0 > 3 ... > .. > > now I need to have a procedure that links variable names from data2 with a > subset "var id" from data1. My idea was to save variable names in a local > macro, then generate string variables from it and merge it to data1 - > however, I am not used to strings and I do not know if that is possible. > > I tried the following > > ****************** > #d; > use data2.dta, clear; > qui ds; > local x "`r(varlist)'"; > qui d; > local y "`r(k)'"; > di `y'; > > forvalues no = 1/`y' {; > gen str61 typ`no' = ""; > local n = `n' + 1; > local Q: word `n' of `x'; > replace typ`no' = string(`Q'); > }; > ****************** > This ends with the content (not the names) of variables copied as string > in the new variables - but this is not what I need, I need names only. > > I would like to proceed by using the index to reshape and then merge it to > the other data set. With export and manipulation by hand I might be able > to solve this problem, but I prefer to have it in Stata. > > I appreciate any suggestion on that, > > thank you > > Johannes > > > > > > ---------------------- > Johannes Geyer > Deutsches Institut für Wirtschaftsforschung (DIW Berlin) > German Institute for Economic Research > Department of Public Economics > DIW Berlin > Mohrenstraße 58 > 10117 Berlin > Tel: +49-30-89789-258 > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**RE: st: converting a local of variable names in string variables***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**Re: st: converting a local of variable names in string variables***From:*Johannes Geyer <JGeyer@diw.de>

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