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From |
David Epstein <david.l.epstein@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: adding variables to a new data file |

Date |
Tue, 12 Feb 2013 22:39:40 -0500 |

The larger problem is that I'm trying to get a lot of variable out of Stata to Excel. I've posted previously about a bug in the Excel parser that won't allow you to export to a file that has a macro button, so that's one issue. And I've tried to just list the variables I want to export, by constructing a local macro called varlist. But then I run into Stata's limit of 244 characters for a string, so I can't do it that way. Oh, and when I try to export the variables all at one time to the Excel sheet, I run into a limit on the number of variables that can be exported at one time, so I have to do it in shifts, which costs me a lot in export time. So I've run into a number of frustrations trying to do what should be a simple task. In general, Stata might make a little more effort to make it easy for the program to interact with other external programs. On Tue, Feb 12, 2013 at 5:37 PM, Nick Cox <njcoxstata@gmail.com> wrote: > My point is the same. Just to add that there's a convenience command > on SSC, -savesome-. > > Nick > > On Tue, Feb 12, 2013 at 10:31 PM, Steve Nakoneshny <scnakone@ucalgary.ca> wrote: > >> It isn't clear to me why you would need a loop in the first place to identify your variables of interest. Is the size of your dataset a limiting factor due to your version of Stata? Can you not simply keep a running tally of the variables you want to keep and export them en masse? Perhaps through the judicious use of a do file? > > On 2013-02-12, at 3:21 PM, David Epstein wrote: > >>> This must be a really easy question to answer, but I'm feeling >>> stumped. I have a data set with a large number of variables in it. I >>> want to create a new data set with a subset of those variables, with >>> the exact variables to be exported being read off a loop a few >>> variables at a time. >>> >>> So for instance I first want to export the key identifying variable, >>> which in my case is date. So I will: >>> >>> preserve >>> keep date >>> save temp, replace >>> restore >>> >>> Then I'll loop through my loop once and get the names of five >>> variables I want to add to temp, call them v1 v2 v3 v4 v5. The next >>> time through, I'll get variables v6 through v10, and so on until I've >>> added, say 50 variables to temp. >>> >>> My question is, what do my loops look like? Am I merging each time >>> through? Keeping, say, date v1 v2 v3 v4 v5, merging, then restoring? I >>> could, but that seems like it could take a while to keep preserving >>> and restoring all the time. Plus, I keep having to save the temp file >>> and then switch back to the master data set. Isn't there a command >>> that says "take these variables from my current data set and add them >>> to another data set?" > > * > * 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/ * * 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/

**Follow-Ups**:**Re: st: adding variables to a new data file***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**st: adding variables to a new data file***From:*David Epstein <david.l.epstein@gmail.com>

**Re: st: adding variables to a new data file***From:*Steve Nakoneshny <scnakone@ucalgary.ca>

**Re: st: adding variables to a new data file***From:*Nick Cox <njcoxstata@gmail.com>

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