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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: Using foreach and forval to append data files |

Date |
Tue, 26 Mar 2013 12:32:21 +0000 |

As a minute refinement, note that foreach j in 1 2 8 { is perfectly acceptable to Stata. Nick On Tue, Mar 26, 2013 at 12:18 PM, Barclay Matthew (SHEFFIELD TEACHING HOSPITALS NHS FOUNDATION TRUST) <matthewbarclay@nhs.net> wrote: > You can append to an empty dataset, so > > clear > forval i = 1/6 { > foreach j of numlist 1 2 8 { > append using `i'_`j'_results > } > } > > will do what you want. statalist@hsphsun2.harvard.edu] On Behalf Of Tim Evans > Using Stata 11.2, I've created 18 individual results sets that have the following naming schedule: > > 1_1_results.dta > 1_2_results.dta > 1_8_results.dta > 2_1_results.dta > 2_2_results.dta > 2_8_results.dta > 3_1_results.dta > 3_2_results.dta > 3_8_results.dta > > This continues until the first number reaches 6. > > What I am trying to achieve is an automated process of appending all data files and I was using the following code - but this adds a duplication of the file 1_1_results: > > use 1_1_results.dta, replace > forval i = 1/6 { > foreach j of numlist 1 2 8 { > append using `i'_`j'_results > } > } > > I then tried this: > > use 1_1_results.dta, replace > forval i = 2/6 { > foreach j of numlist 1 2 8 { > append using `i'_`j'_results > } > } > > Which I then realised that I miss out on any file named: > > 1_2_*** > 1_8_*** > > Other than using the first loop and using -duplicates- to identify and then remove the duplicates, is there a more direct way of using and then appending datasets? * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: time in xtmixed***From:*Chao Wang <chao.wang@obs-gyn.ox.ac.uk>

**st: RE: Using foreach and forval to append data files***From:*"Barclay Matthew (SHEFFIELD TEACHING HOSPITALS NHS FOUNDATION TRUST)" <matthewbarclay@nhs.net>

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