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From |
Donald Spady <dspady@ualberta.ca> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: summary statistics |

Date |
Mon, 1 Oct 2012 11:04:43 -0600 |

Thanks to both of you for your comments and alternative approaches. I liked the original in that it does not destroy the data, as collapse would do, however, it is nice to know there are several possible ways of getting what I want. Nick is also correct in that I am not overly fluent in Stata; I have used it for several years, and am comfortable in general, but only with the basics and what I use on a regular basis. Don On 2012-10-01, at 10:33 AM, Nick Cox <njcoxstata@gmail.com> wrote: > Actually, I pointed to _two_ user-written commands that do this. > > In general, I agree with Clyde. The trade-off between doing it > yourself from first principles and finding a suitable user-written > command (or even an official one) is delicate, and always with a user. > However, the success of Clyde's approach depends partly on his being > an experienced user who is fluent in, and feels comfortable with, much > of Stata. > > With a structure this simple, a two-line solution is also competitive. > > stack HSS*, into(HSS) clear > tab _stack HSS > > -- although that loses some detail on variable names and labels, and > so does not qualify as a good solution by itself. > > However, the full trade-off needs to take account of various awkward facts: > > 1. You might want to do this repeatedly. > > 2. You might (almost certainly will) want to go back to your original > data structure. > > 3. You might want to carry weights through the -reshape- too. > > As said, I am in agreement, just spelling out some issues. > > Nick > > On Mon, Oct 1, 2012 at 5:14 PM, Clyde B Schechter > <clyde.schechter@einstein.yu.edu> wrote: >> Don Spady was looking for a command that would take variables HSS1-HSS18, each with a discrete 1 to 5 response set and create a table like: >> >> Col 1 Col2 Col 3 Col 4 Col5 >> HSS1 n1 n2 n3 n4 n5 >> HSS2 n1 n2 n3 n4 n5 >> HSS3 >> >> And Nick Cox pointed him to a user-written command that does this. >> >> I would just add that this can also be easily done using a few built-in Stata commands: >> >> (I assume there is another variable, called id, which identifies the observations. If not, it can be generated first) >> >> reshape long HSS, i(id) j(varnum) >> collapse (count) Col = id, by(varnum HSS) >> reshape wide Col, i(varnum) j(HSS) >> gen variable= "HSS"+string(varnum) >> list variable Col*, noobs clean >> >> >> I suppose it is a matter of taste which way to do these things. In general, if it is something I do repeatedly, I find the convenience of a single command (which I might write an ado file for myself) worthwhile. But if it's a one-off, it's generally faster to write a few lines of code and also not later be bothered with trying to remember what some unfamiliar command name means. > > * > * 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/ > Donald Spady -- dspady@ualberta.ca * * 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: summary statistics***From:*Lars Folkestad <lfolkestad@health.sdu.dk>

**References**:**st: summary statistics***From:*Clyde B Schechter <clyde.schechter@einstein.yu.edu>

**Re: st: summary statistics***From:*Nick Cox <njcoxstata@gmail.com>

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