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From |
Jeph Herrin <junk@spandrel.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Return a specific bit from integer variable |

Date |
Mon, 05 Oct 2009 10:57:38 -0400 |

The trick is to reduce by half going down from the top, keeping the remainders: * generate an 8-bit integer * clear all set obs 1000 gen myvar=round(uniform()*(2^7),1) * here's the part you need * clonevar newvar=myvar forv i=0/7 { local bit=7-`i' gen byte bit`i'=newvar-2*floor(newvar/2) replace newvar=floor(newvar/2) } hth, Jeph Steinar Fossedal wrote:

Hello again, listers! I have imported an 8-bit integer variable where each bit represents a flag telling me if some property of the observation is true or false. E.g. the number 8 in binary format is 00001000, while 10 would be 00001010. Bit nr. 4 from the left tells me if a car is delivered or not, while the second to the right tells me if it's paid or not. So 8 = car is delivered but not paid, 2 = paid but not delivered, 10 = paid and delivered, etc. I need to split this information into 8 dummyvariables so they can be used to segment my data. Does there exist a fairly smooth way to do this in Stata? Cheers, -Steinar * * 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/

**Follow-Ups**:**Re: st: Return a specific bit from integer variable***From:*Jeph Herrin <junk@spandrel.net>

**References**:**st: Return a specific bit from integer variable***From:*Steinar Fossedal <steinar.fossedal@gmail.com>

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