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

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

Subject |
Re: st: to write _n in [./.] form |

Date |
Sat, 26 Feb 2011 07:06:57 -0500 |

On Feb 26, 2011, at 2:33 AM, ajjee wrote: > I have to calculate a variable in this way > > gen awc_4=1 if awc[_n]==1 & awc[_n+1]!=1 & awc[_n+2]!=1 & awc[_n+3]!=1 & > awc[_n+4]!=1 > > and on basis of the above variable, generate a new variable of average > > gen rgg3avgf=( rgg[_n]+ rgg[_n+1]+ rgg[_n+2])/3 if awc_4[_n-1]==1 > > Is there a way to write the above commands in short form ( like, _n/_n+3) as > for other variables I've to include more terms in calculation of awc_3y and > also for higher term in averages. Assuming that as you are testing awc against 1, it can be either 0 or 1, this should do it: clear set obs 1000 g t = _n tsset t set seed 123456 g awc = (runiform() > 0.2) g rgg = runiform() // egenmore from ssc if not already installed egen awc4 = filter(awc), l(-4/0) normalize egen rggavg = filter(rgg) if L.awc4 == 1, l(-2/0) normalize Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.html An Introduction to Stata Programming | http://www.stata-press.com/books/isp.html An Introduction to Modern Econometrics Using Stata | http://www.stata-press.com/books/imeus.html * * 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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