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From |
Kit Baum <baum@bc.edu> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: re: return a specific bit from integer variable |

Date |
Sun, 4 Oct 2009 09:03:24 -0400 |

<>

mata: mata clear mata: void bit(real scalar v, real scalar w) { string vector d, b d=("0000","0001","0010","0011","0100","0101","0110","0111", // "1000","1001","1010","1011","1100","1101","1110","1111") for(i=1;i<=cols(d);i++) { dd = d[i] :+ d b = b, dd } if( v>0 & v <= 255 & w > 0 & w <= 8) { st_local("v" , b[v+1] ) st_local("w", substr(b[v+1], w, 1)) } } end . mata: bit(128,1) . di "`v' `w'" 10000000 1 . mata: bit(128,3) . di "`v' `w'" 10000000 0 Kit Baum | Boston College Economics & DIW Berlin | http://ideas.repec.org/e/pba1.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/

**Follow-Ups**:**st: RE: re: return a specific bit from integer variable***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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