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From |
"Narahari H.S." <naraharihs@yahoo.co.in> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Getting all independent vars from a set of reg equations |

Date |
Mon, 27 Jun 2011 14:38:20 +0530 (IST) |

Hi Maarten, Thanks for the example code and the explanation. It works like a charm :). However, I have a large number of independent variables and their total no. of characters exceeds 244 - thus resulting in a truncation. How do I tackle this? Also, among the independent variables, I have dummy variables for years which are named with a "y" prefix (like y2000, y2005 etc.). Is there any way to drop these variables? (I was hoping for a -drop y*- command similar to -list uniq- but thats not available) Warm Regards Hari --- On Sun, 26/6/11, Maarten Buis <maartenlbuis@gmail.com> wrote: From: Maarten Buis <maartenlbuis@gmail.com> Subject: Re: st: Getting all independent vars from a set of reg equations To: statalist@hsphsun2.harvard.edu Date: Sunday, 26 June, 2011, 9:20 PM On Sat, Jun 25, 2011 at 3:45 PM, Narahari H.S. wrote: > I have to present a correlation matrix of all independent variables from a set of regression equations. I thought that if I could list (in one place) all the independent variables from all the equations, I could use them with the pwcorr command. You can get the independent variables of one regression model using -indeplist- (which is available form SSC). If you have multiple models, you need to know some tricks on how to deal with local macros in Stata. Below is an example with three models. First I stack all the names in one local macro `x', and than I drop the duplicate names using -local x: list uniq x-. *---------------- begin example ----------------------- sysuse auto reg price mpg foreign indeplist local x = r(X) reg price mpg rep78 foreign indeplist local x "`x' `r(X)'" reg price mpg rep78 foreign gear_ratio indeplist local x "`x' `r(X)'" di "`x'" local x : list uniq x di "`x'" cor `x' *------------------ end example ---------------------- (For more on examples I sent to the Statalist see: http://www.maartenbuis.nl/example_faq ) Hope this helps, Maarten -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/ * * 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/

**Follow-Ups**:**Re: st: Getting all independent vars from a set of reg equations***From:*Maarten Buis <maartenlbuis@gmail.com>

**Re: st: Getting all independent vars from a set of reg equations***From:*Nick Cox <njcoxstata@gmail.com>

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