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From |
Erik Aadland <erikaadland@hotmail.com> |

To |
<statalist@hsphsun2.harvard.edu> |

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

Date |
Tue, 28 Jun 2011 11:27:45 +0000 |

I modified the suggested code a little bit, moving the cond_2 == 1 to the replace line, and now it almost works as intended. The modified code is: sort project_id org_id 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), by(project_id) replace maxwins = x if org_id == `i' & cond_2 == 1 drop include x } However, I do get a strange result when I have more than one org_id with cond_1 == 1 in the same project_id. Here is the resulting output: project_id org_id cond_1 cond_2 cond_3 var_1 var_2 maxwins 1 1 0 1 0 3 0 3 1 2 1 0 0 0 3 . 1 3 0 0 1 0 1 . 2 4 0 1 0 2 0 3 2 4 1 0 0 0 4 . 2 5 1 0 0 0 3 . 2 6 0 1 0 1 0 4 3 8 0 1 0 1 0 . Why does org_id 4 in project_id 2 get a maxwins value of 3 when the max var_2 value for org_id with cond_1 == 1 is 4? And why does org_id 6 in project_id 2 get the correct maxwins value of 4 when org_id 4 does not? Kind regards, Erik Aadland. ---------------------------------------- > Date: Tue, 28 Jun 2011 11:32:53 +0100 > Subject: Re: st: Summarizing properties of other group members meeting specified conditions > From: njcoxstata@gmail.com > To: statalist@hsphsun2.harvard.edu > > 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/ * * 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:*Nick Cox <njcoxstata@gmail.com>

**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>

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

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