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From |
Stef Salvez <loggyedy@googlemail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: converting weekly to monthly data |

Date |
Thu, 28 Jun 2012 22:22:05 +0100 |

Ooops! just a small correction in the data: In my case I have the prices for 2 goods A and B. The prices are broken down by the pack size represented by id (id takes 2 values as there are 2 kind of sizes). An example is the following clear all input str8 (dates1) priceA PriceB id "23/11/08" 0.5637 0.6034 1 "28/12/08" 2 3 1 "25/01/09" 3 4 1 "22/02/09" 3 1 1 "29/03/09" 5 6 1 "26/04/09" 7 7 1 "24/05/09" 1 5 1 "28/06/09" 1 4 1 "26/07/09" 2 5 1 "23/08/09" 5 8 1 "27/09/09" 5 6 1 "25/10/09" 4 6 1 "22/11/09" 2 1 1 "03/01/10" 2 4 1 "31/01/10" 1 7 1 "28/02/10" 6 3 1 "23/11/08" 4 6 2 "28/12/08" 2 3 2 "25/01/09" 3 4 2 "22/02/09" 3 1 2 "29/03/09" 3 4 2 "26/04/09" 7 7 2 "24/05/09" 1 5 2 "28/06/09" 1 4 2 "26/07/09" 6 5 2 "23/08/09" 5 8 2 "27/09/09" 6 6 2 "25/10/09" 4 6 2 "22/11/09" 2 1 2 "03/01/10" 2 3 2 "31/01/10" 1 7 2 "28/02/10" 6 1 2 end Each value represents a 4-week average (28 days). However, some values represent a 5 week average (35) . You can see that from gen dd = date(dates1, "DM20Y") gen dd2 = dd - dd[_n-1] So, in my case using gen daily=dofw(tw) format daily %td gen monthly=mofd(td) format monthly %tm makes no sense because these observations are not weekly but 4 or 5 week averages. My though is to convert these values to daily and then to monthly. Practically i do not know how to do that. Is there any way to achieve that? Kinds regards On 6/28/12, Stef Salvez <loggyedy@googlemail.com> wrote: > In my case I have the prices for 2 goods A and B. The prices are > broken down by the pack size represented by id > (id takes 2 values as there are 2 kind of sizes). > > An example is the following > > > clear all > > input str8 (dates1) priceA PriceB id > "23/11/08" 0.5637 0.6034 1 > "28/12/08" 2 3 1 > "25/01/09" 3 4 1 > "22/02/09" 3 1 1 > "29/03/09" 5 6 1 > "26/04/09" 7 7 > 1 > "24/05/09" 1 5 > 1 > "28/06/09" 1 4 > 1 > "26/07/09" 2 5 > 1 > "23/08/09" 5 8 > 1 > "27/09/09" 5 6 > 1 > "25/10/09" 4 6 1 > "22/11/09" 2 1 > 1 > "03/01/10" 2 4 > 1 > "31/01/10" 1 7 > 1 > "28/02/10" 6 3 > 1 > "23/11/08" 4 6 > 2 > "28/12/08" 2 3 2 > "25/01/09" 3 4 > 2 > "22/02/09" 3 1 > 2 > "29/03/09" 3 4 2 > "26/04/09" 7 7 > 2 > "24/05/09" 1 5 > 2 > "28/06/09" 1 4 > 2 > "26/07/09" 6 5 > 2 > "23/08/09" 5 8 > 2 > "27/09/09" 6 6 > 2 > "25/10/09" 4 6 > 2 > "22/11/09" 2 1 > 2 > "03/01/10" 2 3 > 2 > "31/01/10" 1 7 > 2 > "28/02/10" 6 1 > 2 > > end > > Each value represents a 4-week average (28 days). However, some values > represent a 5 week average (35) . > > You can see that from > > > > gen dd = date(dates1, "DM20Y") > gen dd2 = dd - dd[_n-1] > > > So, in my case using > > gen daily=dofw(tw) > > format daily %td > > gen monthly=mofd(td) > > format monthly %tm > > makes no sense because these observations are not weekly but 4 or 5 > week averages. > > My though is to convert these values to daily and then to monthly. > Practically i do not know how to do that. > > Is there any way to achieve that? > > Kinds regards > > > > On 6/28/12, Sarah Edgington <sedging@ucla.edu> wrote: >> . >> Well, if you don't know what you've done wrong, we certainly have no way >> of >> knowing. You haven't shown us what you did or how it's "not working." >> Try reading the statalist FAQ. >> http://www.stata.com/support/faqs/resources/statalist-faq/ >> Section 3 is particularly useful for figuring out how to formulate >> questions >> in a way that will increase your chances of getting a helpful answer. >> Good luck. >> -Sarah >> >> -----Original Message----- >> From: owner-statalist@hsphsun2.harvard.edu >> [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of j maleii >> Sent: Thursday, June 28, 2012 1:03 PM >> To: statalist@hsphsun2.harvard.edu >> Subject: RE: st: converting weekly to monthly data >> >> >> sorry guys not working. i dont know what ihave done wrong >> >> >> * >> * 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: converting weekly to monthly data***From:*j maleii <jmale117@hotmail.com>

**RE: st: converting weekly to monthly data***From:*tashi lama <ltashi32@hotmail.com>

**Re: st: converting weekly to monthly data***From:*Stef Salvez <loggyedy@googlemail.com>

**RE: st: converting weekly to monthly data***From:*j maleii <jmale117@hotmail.com>

**RE: st: converting weekly to monthly data***From:*j maleii <jmale117@hotmail.com>

**RE: st: converting weekly to monthly data***From:*"Sarah Edgington" <sedging@ucla.edu>

**Re: st: converting weekly to monthly data***From:*Stef Salvez <loggyedy@googlemail.com>

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