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Re: st: RE: replacing var if it meets criteria


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: replacing var if it meets criteria
Date   Sun, 30 Oct 2011 17:10:19 +0000

See this posting from two days ago on automating the mode

http://www.stata.com/statalist/archive/2011-10/msg01387.html

Or it may be that you want the maximum. See the help for -egen- either
way. My answer to your last question also advised to look at -help
egen-.

Nick

On Sun, Oct 30, 2011 at 4:32 PM, Parker, Sophie
<sophia.parker.09@ucl.ac.uk> wrote:

> I'm trying to automate the task of having to evaluate a table. For example, I have a bunch of countries with different port names, some of which are missing. I want to replace the missing value with the port that has the highest volume (volume is given by variable totalFixtureCargoSize). In the table below, this would be Arzew:
>
>
>  tabulate LoadPort totalFixtureCargoSize if LoadCountry == "ALGERIA"
>
>
>                      |      totalFixtureCargoSize
>
>            Load Port |    400000    2310000   6.08e+07 |     Total
>
> ----------------------+---------------------------------+----------
>
>                ARZEW |         0          0        380 |       380
>
>               BEJAIA |         5          0          0 |         5
>
>               SKIKDA |         0         27          0 |        27
>
> ----------------------+---------------------------------+----------
>
>                Total |         5         27        380 |       412
>
>
> I.e., if ALGERIA has a missing LoadPort, then it puts in Arzew. This command clearly doesn't work but should give you an idea:
>
> bysort LoadCountry: replace LoadPort = LoadPort if LoadPort = "" & LoadPort = max(totalFixtureCargoSize)
>

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