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From |
A Loumiotis <antonis.loumiotis@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Re: Decomposing integers |

Date |
Thu, 19 Jul 2012 16:14:07 +0300 |

Thanks as always Nick for you valuable help! Antonis On Thu, Jul 19, 2012 at 4:08 PM, Nick Cox <njcoxstata@gmail.com> wrote: > 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/ * * 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: 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>

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

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