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From |
Maarten buis <maartenbuis@yahoo.co.uk> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: -expand-, -expandcl-, and -set mem-; limit to the number of obs? |

Date |
Sun, 11 Oct 2009 23:42:28 -0700 (PDT) |

-------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- --- Misha wrote: > > "Why am I asking for so much memory?", you might > > ask. Well, I have a data set that, when expanded, > > ought to give me about 2.63e+09 (i.e., nearly > > three billion) observations. Many commands allow you to work with the unexpanded data by using fweights, see -help weight-. > How large is the .dta file you are using (not in > observations, but in terms of disk space)? > Keep in mind that the "size" of your dataset is more than > just the number of observations; so, how many variables are > in the dataset? how many characters/digits are in your > variables? are there labels, notes, or other > characteristics stored in your .dta file? All of these > will contribute to the amount of memory needed open the file > in Stata (this is also why it is difficult to do a simple > "back-of-the-envelope" calculation of the exact amount of > memory you need). Here is how to do such back of the envelope calculation: http://www.stata.com/support/faqs/data/datacalc.cgi Hope this helps, Maarten * * 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/

**References**:**Re: st: RE: -expand-, -expandcl-, and -set mem-; limit to the number of obs?***From:*"Eric A. Booth" <ebooth@ppri.tamu.edu>

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