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From |
daniel klein <klein.daniel.81@googlemail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Use 2 variables to gen 10 new variables |

Date |
Thu, 28 Jul 2011 18:54:40 +0200 |

Jonathan, here is another (last) try. I still do not see what you want to do with variables like these, and I strongly recommend looking for other solutions to your problem. Note that the created variables have no conection to the observations in the dataset, just like the variables generated by -prgen- (from findit -spost9-), meaning that values are filled in starting from the first observation. Also note, that the approach is not (yet) very stable. All variables have to hold the same number of values (5 in the example below). I did not -set seed- so just run the example a couple of times (or to speed things up, delete a complete category from x1) to see the problem. I guess you can probably fix this, however since I cannot figure out what these variables are needed for, I lack motivation. * set data clear set obs 20 forval j = 1/2 { g x`j' = 1 +int(5*runiform()) } replace x1 = . in 1 la de x 1 Y1 2 Y2 3 Y3 4 Y4 5 Y5 la val x* x * view tab1 * * new variables forval j = 1/5 { qui g y`j' = . } la de y 1 X1 2 X2 la val y* y * fill in values tempname freq freqx1 freqx2 forval j = 1/2 { qui ta x`j' ,matcell(`freqx`j'') } forval j = 1/5 { loc to = `freqx1'[`j', 1] qui replace y`j' = 1 in 1/`to' loc from = `to' + 1 loc to = `to' + `freqx2'[`j', 1] qui replace y`j' = 2 in `from'/`to' } * view l tab1* Best Daniel * * 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/

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