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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
st: RE: set obs equal to a scalar |

Date |
Tue, 16 Sep 2008 19:16:17 +0100 |

The syntax you want is . set obs `=ObsPerPerson' Or in extremis . set obs `=scalar(ObsPerPerson)' -- because (the name of) a scalar is not a number, or (the name of) a local macro, as implied by other syntaxes you tried. Irritating, but true. A separate implication is that I would not put this number in a scalar, because of the extra effort needed to get it out again. To automate -set obs-, I would use a local macro. -display-'s job is to go the extra mile [sc. kilometre], as I mused not so long ago on this list, so what -display- can do is not a precedent for other commands. Nick n.j.cox@durham.ac.uk Jacob Wegelin In the example below, it is impossible to set obs equal to a scalar value 5, but it is possible to set obs to equal the same value 5 when it is stored in a local macro. Why? Is there no way to set obs equal to a scalar? . clear . scalar define ObsPerPerson=5 . di ObsPerPerson 5 . set obs ObsPerPerson 'ObsPerPerson' found where integer expected r(198); . set obs `ObsPerPerson' invalid syntax r(198); . set obs "`ObsPerPerson'" '"' found where integer expected r(198); . local heyThere 5 . set obs `heyThere' obs was 0, now 5 * * 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**:**st: set obs equal to a scalar***From:*Jacob Wegelin <jwegelin@vcu.edu>

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