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| From | "Peci, Adriana (OAHPP)" <Adriana.Peci@oahpp.ca> |
| To | <statalist@hsphsun2.harvard.edu> |
| Subject | RE: st: FW: Ranking a string variable |
| Date | Mon, 23 Jan 2012 14:52:41 -0500 |
Maybe I wasn't that clear but this is what I got after I run the "bysort department time: gen rank=_n" code.
Ranking by time within the department instead of ranking by department and time at the same time.
+-----------------------------------------------+
| department time item rank |
|-----------------------------------------------|
4988. | 2270-2010-149 26 Dec 10 10C0835920 1 |
4989. | 2270-2010-149 26 Dec 10 10C0835921 2 |
4990. | 2270-2010-149 28 Dec 10 10C0835943 1 |
4991. | 2270-2010-149 28 Dec 10 10C0835944 2 |
4992. | 2270-2010-149 28 Dec 10 10C0835942 3 |
|-----------------------------------------------|
4993. | 2270-2010-149 28 Dec 10 10C0835945 4 |
+-----------------------------------------------+
After applying that I thought I was too close to the right solution.
So I tried to sort by department and time first and then I run
the "bysort department: gen rank=_n" code only. It seems that it worked.
+------------------------------------------------+
| department time item rank2 |
|------------------------------------------------|
4988. | 2270-2010-149 26 Dec 10 10C0835920 1 |
4989. | 2270-2010-149 26 Dec 10 10C0835921 2 |
4990. | 2270-2010-149 28 Dec 10 10C0835944 3 |
4991. | 2270-2010-149 28 Dec 10 10C0835942 4 |
4992. | 2270-2010-149 28 Dec 10 10C0835943 5 |
|------------------------------------------------|
4993. | 2270-2010-149 28 Dec 10 10C0835945 6 |
+------------------------------------------------+
Thank you so much for your help,
Adriana
-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Dimitriy V. Masterov
Sent: January 23, 2012 1:21 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: FW: Ranking a string variable
Does "bysort department time: gen rank=_n" do the trick?
DVM
On Mon, Jan 23, 2012 at 1:11 PM, Peci, Adriana (OAHPP)
<Adriana.Peci@oahpp.ca> wrote:
>
> Hello stata listers,
>
> I need some help to rank a string variable by two other variables. My
> data are in a long form in which one observation is listed more than
> once.
> The variable of interest is Item purchased which I would like to rank
> based on the Department that this item belongs to and
> The time whern this item was purchased.
> So if departments categories are A, B, C, D etc (string variable) which
> are listed more than once in the database and the items are unique
> values as x, y, z,.(string variable) etc.
> I want to count items of each department by purchased time as 1, 2, 3,
> 4, 5. So in case of two items were purchased at the same time I want
> them to be randomly ranked as 1, 2 and not 1,1.
>
> I am trying to use the egen command: bysort department time: egen rank
> =rank(item) but it doesn't work for a string variables.
>
> Can anyone help me with that ?
>
>
> Thank you so much,
>
>
> Adriana Peci
>
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