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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Re: Decomposing integers |

Date |
Thu, 19 Jul 2012 14:08:45 +0100 |

You said you wanted a local macro. Look at -inbase- for binary representations. Nick On Thu, Jul 19, 2012 at 1:48 PM, Nick Cox <njcoxstata@gmail.com> wrote: > clear > set obs 100 > gen y = _n > gen Y = mod(y, 32) > egen bin = base(Y) > gen wanted = reverse(bin) + string(floor(y/32)) > > . l if y == 22 | y == 65 > > +--------------------------+ > | y Y bin wanted | > |--------------------------| > 22. | 22 22 10110 011010 | > 65. | 65 1 00001 100002 | > +--------------------------+ > > The extra -egen- function here is -base()- from -egenmore- (SSC). > > Nick > > On Thu, Jul 19, 2012 at 1:00 PM, A Loumiotis > <antonis.loumiotis@gmail.com> wrote: >> The last local should contain 1 0 0 0 0 2. >> >> On Thu, Jul 19, 2012 at 2:54 PM, A Loumiotis >> <antonis.loumiotis@gmail.com> wrote: >>> Hi, >>> >>> I have integer numbers of the following form: >>> >>> X=Sum[i=0/4](a[i]2^i)+(a[5]*2^5) >>> >>> where a[i] equals either 0 or 1 if i=0/4 and a[5] equals to any >>> positive integer or 0. >>> >>> Given this construction I would like to find the unique combinations >>> of a[i]'s that generated X. >>> >>> For example: >>> >>> X=22 was generated using a[1]=1, a[2]=1 and a[4]=1. >>> So I would like to construct a local that contains the following list >>> 0 1 1 0 1 0 >>> >>> X=65 was generated using a[0]=1 and a[5]=2 >>> So in this case the local should contain 1 0 0 0 0 1 >>> >>> Is this possible? * * 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: Re: Decomposing integers***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**References**:**st: Decomposing integers***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**st: Re: Decomposing integers***From:*A Loumiotis <antonis.loumiotis@gmail.com>

**Re: st: Re: Decomposing integers***From:*Nick Cox <njcoxstata@gmail.com>

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