Notice: On March 31, it was **announced** that Statalist is moving from an email list to a **forum**. The old list will shut down on April 23, and its replacement, **statalist.org** is already up and running.

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Summarizing properties of other group members meeting specified conditions |

Date |
Tue, 28 Jun 2011 11:32:53 +0100 |

I guess that your original typo remains in gen include 1 = if org_id != `i' & cond_1 == 1 which should be more like gen include = 1 if org_id != `i' & cond_1 == 1 Warning: I am not sure that I have grasped your verbal summary of what you want. My emphasis is on showing you Stata techniques. Nick On Tue, Jun 28, 2011 at 11:16 AM, Erik Aadland <erikaadland@hotmail.com> wrote: > Thank you so much for your help and input, Nick. I sincerely appreciate it. > > When testing the suggested code, after having sorted on project_id and org_id, I get an error message for the following line of code: > > quietly forvalues i = 1/`r(max)' { > > The error message is: > > 1 invalid name > r(198); > > How to get around this problem? > > > Kind regards, > > Erik Aadland. > > > > >> Date: Tue, 28 Jun 2011 08:20:57 +0100 >> Subject: Re: st: Summarizing properties of other group members meeting specified conditions >> From: njcoxstata@gmail.com >> To: statalist@hsphsun2.harvard.edu >> >> There was another typo in the line I corrected (you can't have two >> -if-s) and it is not clear where your r(max) comes from. This may be >> closer, but I've not tested it. >> >> gen maxwins = . >> su org_id, meanonly >> quietly forvalues i = 1/`r(max)' { >> gen include 1 = if org_id != `i' & cond_1 == 1 >> egen x = max(var_2 * include) if cond_2 == 1, by(project_id) >> replace maxwins = x if org_id == `i' >> drop include x >> } >> >> >> >> On Mon, Jun 27, 2011 at 3:26 PM, Erik Aadland <erikaadland@hotmail.com> wrote: >> > Dear statalist. >> > >> > After having read the following FAQ http://www.stata.com/support/faqs/data/members.html and experimented with solutions, I am still struggling. >> > >> > For each project_id, I am trying to generate a variable that for each org_id that meets a specified condition generates the highest observed value on a given variable for another org_id that meets a different specified condition. I think an example is in order: >> > >> > Example structure: >> > >> > project_id org_id cond_1 cond_2 cond_3 var_1 var_2 >> > 1 1 0 1 0 3 0 >> > 1 2 1 0 0 0 3 >> > 1 3 0 0 1 0 1 >> > 2 4 0 1 0 2 0 >> > 2 4 1 0 0 0 4 >> > 2 5 1 0 0 0 3 >> > 2 6 0 1 0 1 0 >> > 3 8 0 1 0 1 0 >> > >> > >> > For instance, for each project_id I try generate a variable that for each org_id meeting cond_2 == 1 produces the highest value of var_2 for org_id that meets cond_1 == 1. In the case of project_id 1 above org_id 1 should get a score of 3, while org_id 2 and 3 should get a missing value. Some project_ids may have only one observation (consist of a single org_id) as in project_id 3 above, or may not have other org_ids represented that meet the specified condition. Then, it is of course not possible to generate a value on the variable. >> > >> > I have tried with the following code, but I cannot figure out how to specify cond_2 == 1, and it comes out all wrong (Stata does not even accept my code): >> > >> > sort project_id org_id >> > gen maxwins = . >> > quietly forvalues i = 1/`r(max)' { >> > gen include 1 = if org_id != `i' if cond_1 == 1 >> > egen x = max(var_2 * include), by(project_id) >> > replace maxwins = x if org_id == `i' >> > drop include x >> > } >> > >> > Is it possible to do this without loops also? >> >> * >> * 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/ > * * 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: Summarizing properties of other group members meeting specified conditions***From:*Erik Aadland <erikaadland@hotmail.com>

**References**:**st: Summarizing properties of other group members meeting specified conditions***From:*Erik Aadland <erikaadland@hotmail.com>

**Re: st: Summarizing properties of other group members meeting specified conditions***From:*Nick Cox <njcoxstata@gmail.com>

**RE: st: Summarizing properties of other group members meeting specified conditions***From:*Erik Aadland <erikaadland@hotmail.com>

- Prev by Date:
**RE: st: Summarizing properties of other group members meeting specified conditions** - Next by Date:
**RE: st: Summarizing properties of other group members meeting specified conditions** - Previous by thread:
**RE: st: Summarizing properties of other group members meeting specified conditions** - Next by thread:
**RE: st: Summarizing properties of other group members meeting specified conditions** - Index(es):