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From |
Stas Kolenikov <skolenik@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: programming error with -generate- |

Date |
Mon, 8 Mar 2010 16:22:43 -0600 |

OK, here's the synopsis: 1.2x is hexadecimal, i.e. 1.2x = 1 + 2/16 = 1.125 decimal. Now, the interesting part is that "+6" in the original post means "move the decimal point 6 times to the right": forvalues k=0/6 { di 1.2x + `k' } In the muggles' world, "move the decimal point one position to the right" means "multiply by 2". So it looks like the whole meaning of the spell "1.2x+6" is actually a number in a hexidecimal representation with an implicit exponentiation: di (1.2x+6) - ((1+2/16)*2^6) On Mon, Mar 8, 2010 at 4:14 PM, Lachenbruch, Peter < Peter.Lachenbruch@oregonstate.edu> wrote: > But then it seems to take 12 and multiply by 6 to get 72. This is the kind > of arithmetic my students sometimes do... :-) > > Tony > > Peter A. Lachenbruch > Department of Public Health > Oregon State University > Corvallis, OR 97330 > Phone: 541-737-3832 > FAX: 541-737-4001 > > > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu [mailto: > owner-statalist@hsphsun2.harvard.edu] On Behalf Of Richard Williams > Sent: Monday, March 08, 2010 1:51 PM > To: statalist@hsphsun2.harvard.edu; 'statalist@hsphsun2.harvard.edu' > Subject: Re: st: programming error with -generate- > > At 04:31 PM 3/8/2010, Visintainer, Paul wrote: > >. gen y = 1.2x + 6 <----- why isn't there an error here? > > When I do this, y = 72 for all cases. So 1.2x must be getting > interpreted as 1.2 * 10 = 12. I don't know why, but just follow > Martin's advice and make it > > gen y = 1.2*x + 6 > > Maybe this is a "feature" but if so it doesn't seem like a good one, > since this could be an easy mistake to make. > > -- Stas Kolenikov, also found at http://stas.kolenikov.name Small print: I use this email account for mailing lists only. * * 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: programming error with -generate-***From:*"Visintainer, Paul" <Paul.Visintainer@baystatehealth.org>

**Re: st: programming error with -generate-***From:*Richard Williams <Richard.A.Williams.5@ND.edu>

**RE: st: programming error with -generate-***From:*"Lachenbruch, Peter" <Peter.Lachenbruch@oregonstate.edu>

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