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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: sampling program help |

Date |
Tue, 4 Jan 2011 16:27:41 -0600 |

This is a starting point (it ignores the prone_flood variable, as I could not understand how you use it): recode tot_sansad (8/12=1) (13/14=2) (15/16=3) (17/20=4), gen( samplesize) generate rnd = uniform() bysort gp (rnd) : gen byte tosample = (_n <= samplesize) keep if tosample On Tue, Jan 4, 2011 at 3:45 PM, george joseph <gjosephresearch@gmail.com> wrote: > Hi, > I would like to have your help with writing a program to resolve the > following sampling issue I have > I have data on 223 sansads ( sansad_id) in 19 GPs . The variable > prone_flood_cyclone (1-4) indicates > the strength of floods and cyclones in the sansads and tot_sansads > indicates the total number of sansads in each GP. > > I would like to draw a sample of 55 sansads in the following manner. > 1) The sample should contain sansads from all 19 GPS > 2) If the total number of sansads (tot_sansads) in a GP is less than > 12, we should draw one sansad, if tot_sansads is between 13 and 14, > we should draw 2 sansads, if tot_sansads is between 15 and 16, we > should draw 3 sansads, and if tot_sansads is between 17 and 20, we > should draw 4 sansads. > > The following is the METHOD OF ALLOCATION of the number of SANSADs in > each of the GPs giving OVER-WEIGHTAGE to SANSADs Prone to floods, > cyclones etc. > If the > Total number of SANSADs in one GP :8-12 > Number of SANSADs to be selected : 1 > Method of Allocation ( based on ne_flood_cyclone) > 1 to be selected from Code’4 ‘. If Code 4 is ‘NIL’, than 1 > from Code ‘3’. If Code 3 is also’ NIL’, then 1 from Code’2’. If Code > 2 is also ‘NIL’, then 1from Code ‘1’. > > if > Total number of SANSADs in one GP :13-14 > Number of SANSADs to be selected : 2 > Method of Allocation ( based on prone_flood_cyclone) > 1 from Code ‘4’+from Code’3’ – otherwise, follow the sequence > as in sl.1. > if > Total number of SANSADs in one GP :15-16 > Number of SANSADs to be selected : 3 > Method of Allocation ( based on prone_flood_cyclone) > 1from Code’4’ +1from Code’3’+1 from Code’2’- otherwise, follow > the sequence as in sl.1. > and if > Total number of SANSADs in one GP :17-20 > Number of SANSADs to be selected : 4 > Method of Allocation ( based on prone_flood_cyclone) > 2from Code’4’+1 from Code’3’+ 1from Code’2’+1 from Code’1’- > otherwise, follow the sequence as in sl.1. > > Could you let me know how I can do this which can be replicated . > Thanks. > George > > * > * 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/ > -- 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/

**Follow-Ups**:**Re: st: sampling program help***From:*george joseph <gjosephresearch@gmail.com>

**References**:**st: sampling program help***From:*george joseph <gjosephresearch@gmail.com>

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