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From |
tashi lama <[email protected]> |

To |
<[email protected]> |

Subject |
RE: st: ranking variables on the basis of total values of observations |

Date |
Wed, 28 Mar 2012 20:44:41 +0000 |

Hello Nick, My apology, I mean rowranks, not rowsum. So, let's see if I could simplify it... Essentially I want to be able to rank var2 in the following dataset looking at its total values of obs from 05jan2010 to 09jan2010. so, I would use generate sum to get a rumsum. That would look like date var2 var3 var4 totalv~2 totalv~3 totalv~4 1. 05jan2010 3 1 7 3 1 7 2. 06jan2010 2 3 6 5 4 13 3. 07jan2010 4 4 5 9 8 18 4. 08jan2010 1 2 4 10 10 22 5. 09jan2010 5 8 3 15 18 25 6. 10jan2010 8 9 2 23 27 27 7. 11jan2010 4 6 3 27 33 30 8. 12jan2010 3 3 8 30 36 38 9. 13jan2010 1 2 3 31 38 41 So, I would look at the observations at 09jan2010. So, as you can see, var2 has 5, var3 has 8 and so on. since 5 is the second lowest in that row after 3, I would say var2 is 2nd. Now, I have to able to code this and that is exactly I think you guys can help me or give me a lead. Thank you and let me know if I could make more clea. Tashi > Date: Wed, 28 Mar 2012 21:17:19 +0100 > Subject: Re: st: ranking variables on the basis of total values of observations > From: [email protected] > To: [email protected] > > I don't know what -rowsum- is here. > > Thanks, but this doesn't get me much closer. Of course, if other > people can work out what you want, they should chip in. > > Please _show_ what you want it changed to, as I asked earlier. No > word description, just what the dataset would like look after changes. > > Nick > > On Wed, Mar 28, 2012 at 8:49 PM, tashi lama <[email protected]> wrote: > > > date var2 var3 var4 > > 1. 05jan2010 3 1 7 > > 2. 06jan2010 2 3 6 > > 3. 07jan2010 4 4 5 > > 4. 08jan2010 1 2 4 > > 5. 09jan2010 5 8 3 > > 6. 10jan2010 8 9 2 > > 7. 11jan2010 4 6 3 > > 8. 12jan2010 3 3 8 > > 9. 13jan2010 1 2 3 > > > > > Say, I would like to rank var2 for certain period of time say (05jan2010-09jan2010). So, I would have Stata add the obs values from 05jan2010 to 09jan2010 for all the variables and rank var2 like 1st or 2nd or 3rd. I looked at rowsum. I don't think it will help. > > >> Date: Wed, 28 Mar 2012 20:34:58 +0100 > >> Subject: Re: st: ranking variables on the basis of total values of observations > >> From: [email protected] > >> To: [email protected] > >> > >> As far as I can see this could mean several things. I am not clear > >> that when you say "rank" you don't mean "order" instead. > >> > >> I don't think you want -rowranks- (SSC). > >> > >> Why not just give us a toy dataset, with say 5 observations and 5 > >> variables, and what you want to change it to? Then it should be easier > >> to see what you want. > >> > >> By the way, adding lots of blank lines just makes your posts more > >> difficult to read. I've edited what came in. > >> > >> Nick > >> > >> On Wed, Mar 28, 2012 at 8:22 PM, tashi lama <[email protected]> wrote: > >> > > >> > I have a list of variables and I would like to rank the variables or any given variable for that matter on the basis of total values of their observations. I thought of approaching this problem in the following way. > >> > > >> > 1. find the running sum of all the variables using generate or the total using egen although I think I would prefer generate. > >> > > >> > say there are var1 var2 var3 > >> > > >> > gen tvar1=sum(var1) > >> > gen tvar2=sum(var2) > >> > gen tvar3=sum(var3) > >> > > >> > 2. then compare tvar1, tvar2 and tvar3 using if conditions. > >> > > >> > Once this is done, I would like to expand such that I can rank those variables but for given period of time. And this is essentially why I think generate sum is better for this problem because it is a running sum. > >> > >> > say date var1 var2 var3 > >> > > >> > I would like to be able to rank variables say for 01jan2011 to 01feb2011 and so on. > >> > > >> > Has anyone worked in this kind of problem before or does anyone have any idea or thought regarding this problem? Any help or lead would be highly appreciated? I saw that there is a stata module rowranks to calculate ranks in a row but i don't know how can it be useful to me. Most probably not.... > > * > * 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**:

**References**:**st: ranking variables on the basis of total values of observations***From:*tashi lama <[email protected]>

**Re: st: ranking variables on the basis of total values of observations***From:*Nick Cox <[email protected]>

**RE: st: ranking variables on the basis of total values of observations***From:*tashi lama <[email protected]>

**Re: st: ranking variables on the basis of total values of observations***From:*Nick Cox <[email protected]>

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