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From |
Christopher F Baum <baum@bc.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: Re: generating dataset with specific params |

Date |
Wed, 18 Aug 2004 20:00:58 -0400 |

wrote

After reviewing the faq's and the archive I've been unable to find guidance

or a module that would assist in generating data sets from scratch or at

least near it. For instance, is it possible to identify statistical

parameters, input them into stata, which would produce a data set as its

product, such as, generate a newvariable with 109 observations that have a

mean of 10.62 and a standev of 1.74. Maybe I've missed some guidance or

perhaps such a command is not possible (or desirable?), or this is a goofy

thought to start with. I reviewed -generate-, -exp-, -if-, etc but

everything appears to build on a primary data set. When reading articles or

text examples, one doesn't have access to the data set often, and sometimes

I'd like to test what's being put forward on a dataset, just simply run the

numbers. I have used -display- and some of the -i- commands, that's fine,

but one can't work from other angles what's being put forward in the

article/text, etc.

. set obs 109

obs was 0, now 109

. g double v1 = 1.74*invnorm(uniform())+10.62

. su

Variable | Obs Mean Std. Dev. Min Max

-------------+--------------------------------------------------------

v1 | 109 10.6402 1.734998 6.296962 14.36916

This would work better with a larger sample:

. set obs 10900

obs was 0, now 10900

. g double v1 = 1.74*invnorm(uniform())+10.62

. su

Variable | Obs Mean Std. Dev. Min Max

-------------+--------------------------------------------------------

v1 | 10900 10.61984 1.736441 3.801061 17.71306

Kit

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