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From |
"Martin Weiss" <martin.weiss1@gmx.de> |

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

Subject |
RE: st: using postfile in a loop |

Date |
Mon, 9 Nov 2009 23:40:24 +0100 |

<> http://www.stata.com/support/faqs/data/foreach.html What do you mean by " gen variable with built-in loop"? HTH Martin -----Original Message----- From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Kushan Thakkar Sent: Montag, 9. November 2009 23:34 To: statalist@hsphsun2.harvard.edu Subject: Re: st: using postfile in a loop Thanks everyone for calling me out on the no loop part. On a different note, how can I loop on a single variable ? For example, let's say if I wanted to loop over the date variable and then over the cusip variable, how would I go about doing this? I understand that there is no need to explicitly create loop since I can use gen variable with built-in loop. However, I want to do this so that I can understand how loops and postfile work with each other. Thanks. On Mon, Nov 9, 2009 at 5:14 PM, Maarten buis <maartenbuis@yahoo.co.uk> wrote: > --- On Mon, 9/11/09, Kushan Thakkar wrote: >> I have a dataset the contains the following data: >> >> cusip ticker date prc ....(few more variables).... RminusI >> >> I need to isolate data points for which RminusI is less >> than its first decile and then post these data points in a >> different file. > > This is not a case for -postfile- or a loop. In the example > below nlsw88.dta is your master data, grade is your id variable, > and wage is your RminusI variable. > > *---------- begin example -------------- > sysuse nlsw88, clear > bys grade: egen lb = pctile(wage), p(10) > keep if wage < lb > *------------ end example -------------- > ( For more on how to use examples I sent to statalist see: > http://www.maartenbuis.nl/stata/exampleFAQ.html ) > > Hope this helps, > Maarten > -------------------------- > Maarten L. Buis > Institut fuer Soziologie > Universitaet Tuebingen > Wilhelmstrasse 36 > 72074 Tuebingen > Germany > > http://www.maartenbuis.nl > -------------------------- > > > > > > > > * > * 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/ > * * 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/ * * 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: using postfile in a loop***From:*Kushan Thakkar <kthakk4@gmail.com>

**Re: st: using postfile in a loop***From:*Maarten buis <maartenbuis@yahoo.co.uk>

**Re: st: using postfile in a loop***From:*Kushan Thakkar <kthakk4@gmail.com>

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