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From |
hind lazrak <hindstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: reshaping database with dates ordered in wide format to long format |

Date |
Sun, 10 Feb 2013 04:40:41 -0800 |

Thanks Nick for looking at this question. I actually tried some of the code you gave not so long ago to another fellow on the stata list (see thread with Roland on 12/7/2012) but adapting the loop in my case was not successful. Here's an excerpt of what my data looks like after some "rename-ing". As you can see, the study participants have filled the question in chronological order (it made the rename process quite easy) list id movedfromconsent_to3m startdateconsent PCconsent enddateconsent startdatehome1 PChome1 enddatehome1 startdatehome2 PChome2 enddatehome2 residhx in 32/35 , sepby(id) +----------------------------------------------------------------------------------------------------------------------------------+ id moved~3m startd~t PCcons~t enddat~t s~ehome1 PChome1 en~ehome1 st~ehome2 PChome2 e~ehome2 residhx ---------------------------------------------------------------------------------------------------------------------------------- 32. 20073 1 1-Aug-09 V6T2G1 6-Dec-09 6-Dec-09 V6Y3W3 30-Dec-09 30-Dec-09 V6T2G1 3-Mar-10 3 33. 20073 1 1-Aug-09 V6T2G1 6-Dec-09 6-Dec-09 V6Y3W3 30-Dec-09 30-Dec-09 V6T2G1 3-Mar-10 3 34. 20073 1 1-Aug-09 V6T2G1 6-Dec-09 6-Dec-09 V6Y3W3 30-Dec-09 30-Dec-09 V6T2G1 3-Mar-10 3 35. 20073 1 1-Aug-09 V6T2G1 6-Dec-09 6-Dec-09 V6Y3W3 30-Dec-09 30-Dec-09 V6T2G1 3-Mar-10 3 ---------------------------------------------------------------------------------------------------------------------------------- Many thanks! On Sun, Feb 10, 2013 at 3:34 AM, Nick Cox <njcoxstata@gmail.com> wrote: > More strategic advice. You would need some -rename-ing first, so that > postcodes, etc., dates, etc. end up aligned. > > Nick > > On Sun, Feb 10, 2013 at 10:48 AM, Nick Cox <njcoxstata@gmail.com> wrote: >> I have strategic rather than tactical advice as I failed to absorb >> everything here. -reshape long- first, however crudely, then work on >> the dataset in that form. >> >> It sounds as if you are seeking a command that does everything in one >> go, but that sounds unlikely. >> >> If you don't get better answers: >> >> 1. An example of the data usually helps. >> >> 2. Show us the commands you have tried so far. >> >> Nick >> >> On Sun, Feb 10, 2013 at 10:33 AM, hind lazrak <hindstata@gmail.com> wrote: >> >>> I have a cohort of families that are followed over time. >>> They are asked at one time point (3months after the birth of their >>> child) to list the addresses and dates of move in and move out where >>> they have lived since they consented to participate in the study. >>> >>> For some families it is simple: they have never moved- but for others, >>> there is quite some movement. >>> The way the questionnaire was entered is shaped in wide format >>> For example, consider this simplified version of the data I have >>> For each id we have the following variables >>> reside3mq1 reside3mq2 reside3mq2a reside3mq2b >>> reside3mq3 reside3mq3a reside3mq3b >>> reside3mq4 reside3mq4a reside3mq4b >>> >>> Data dictionary - >>> reside3mq1 is binary and indicates if the family has moved since consent >>> >>> reside3mq`i' is the date of move-in in address`i' >>> reside3mq`i'a is the postal code at address `i' /*postal code is alphanumeric*/ >>> reside3m`i'b is the date of move-out at address`i' >>> >>> So, if `i' can go from 2 to 5 (not all family move 3 times so it varies by id) >>> How can I generate a data set where each id has `i' rows with move-in >>> and move-out dates and corresponding postal code? >>> > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/statalist-faq/ > * http://www.ats.ucla.edu/stat/stata/ On Sun, Feb 10, 2013 at 3:34 AM, Nick Cox <njcoxstata@gmail.com> wrote: > More strategic advice. You would need some -rename-ing first, so that > postcodes, etc., dates, etc. end up aligned. > > Nick > > On Sun, Feb 10, 2013 at 10:48 AM, Nick Cox <njcoxstata@gmail.com> wrote: >> I have strategic rather than tactical advice as I failed to absorb >> everything here. -reshape long- first, however crudely, then work on >> the dataset in that form. >> >> It sounds as if you are seeking a command that does everything in one >> go, but that sounds unlikely. >> >> If you don't get better answers: >> >> 1. An example of the data usually helps. >> >> 2. Show us the commands you have tried so far. >> >> Nick >> >> On Sun, Feb 10, 2013 at 10:33 AM, hind lazrak <hindstata@gmail.com> wrote: >> >>> I have a cohort of families that are followed over time. >>> They are asked at one time point (3months after the birth of their >>> child) to list the addresses and dates of move in and move out where >>> they have lived since they consented to participate in the study. >>> >>> For some families it is simple: they have never moved- but for others, >>> there is quite some movement. >>> The way the questionnaire was entered is shaped in wide format >>> For example, consider this simplified version of the data I have >>> For each id we have the following variables >>> reside3mq1 reside3mq2 reside3mq2a reside3mq2b >>> reside3mq3 reside3mq3a reside3mq3b >>> reside3mq4 reside3mq4a reside3mq4b >>> >>> Data dictionary - >>> reside3mq1 is binary and indicates if the family has moved since consent >>> >>> reside3mq`i' is the date of move-in in address`i' >>> reside3mq`i'a is the postal code at address `i' /*postal code is alphanumeric*/ >>> reside3m`i'b is the date of move-out at address`i' >>> >>> So, if `i' can go from 2 to 5 (not all family move 3 times so it varies by id) >>> How can I generate a data set where each id has `i' rows with move-in >>> and move-out dates and corresponding postal code? >>> > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/faqs/resources/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/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/

**References**:**st: reshaping database with dates ordered in wide format to long format***From:*hind lazrak <hindstata@gmail.com>

**Re: st: reshaping database with dates ordered in wide format to long format***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: reshaping database with dates ordered in wide format to long format***From:*Nick Cox <njcoxstata@gmail.com>

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