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From |
Baruffaldi Stefano Horst <stefano.baruffaldi@epfl.ch> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
st: Problem with local macro command and marginsplot |

Date |
Fri, 7 Jun 2013 07:38:33 +0000 |

Dear all, I have a problem with the local macro command. I really tried everything and I cannot find any logic for this problem – unless it is a bug. I could find no previous post that addressed a similar issue. I am running the following command: sum x, d local m_x r(p50) local low_x r(p25) local high_x r(p75) sum y, d local m_y = r(p50) local high_y = r(p25) local low_y = r(p75) qui: xtreg vardep c.y ##c.x, fe margins, at(x=(0(0.5)12) prior_diffy=( `low_y' `m_y' `high_y')) post marginsplot, xlabel(0(0.5)12) xline(` low_x ' ` m_x ' ` high_x ') right after the margins command I get the error message: “invalid numlist” or “invalid numlist has too few elements”. After a while I figured out that probably the problem is the local command: if I type for instance [dis `m_y'] it shows that there is no value stored. But the most weird thing is that if I run [dis `m_y'] right after the sum command sometimes there is the value (sometimes not, especially if I run the command directly from the do-file). In any case, after I run the margins command (whether with post option or not) the “locals” are always empty. Furthermore I used a similar code in the past without problems. This is my main problem. Additionally, I was wondering if there is a way to indicate directly in the margins command the percentiles of the variable I want to be considered. I tried with: margins, at( (p25) y x=(0(0.5)12)) /// at( (p50) y x=(0(0.5)12)) /// at( (p75) y x=(0(0.5)12)) it works but I got an error after the marginsplot command saying that something more was expected Hope someone can help me. Thanks Stefano * * 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: Problem with local macro command and marginsplot***From:*Nick Cox <njcoxstata@gmail.com>

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