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RE: st: long to wide conversion


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: long to wide conversion
Date   Thu, 7 Oct 2010 13:37:22 +0100

No; that won't work. 

-reshape- requires a subcommand, usually but not invariably -long- or -wide-. 

See however <http://www.hsph.harvard.edu/cgi-bin/lwgate/STATALIST/archives/statalist.1010/date/article-207.html> for a suggestion in similar vein. 

Nick 
n.j.cox@durham.ac.uk 

Ada Ma

This should work:

sort id collect_date order_type, stable
by id collect_date order_type: gen seq=_n
reshape drug_code     drug_result, i(id collect_date order_type) j(seq)

On Thu, Oct 7, 2010 at 11:53 AM, King, Carina <c.king09@imperial.ac.uk> wrote:

> I have a data set in long form and i want to convert it to wide. I have tried the 'reshape' command (using various combinations of variables) but it won't work. The problem is, there aren't any unique j values for the i's.
>
> The variables I want to be sorted on are the id, collect_date and order_type. The for it to read across for drug_code and drug_result (They are all string variables). Below as an example of how my data is set up.
>
> Id       collect_date     order_type        drug_code     drug_result
>
> 34       03aug2010        CFS                   Amp            SS
> 34       03aug2010        CFS                   Oxy            0.1-SS
> 34       10aug2010        CFS                   Methc          R
> 57       05mar2008        Urine                 Amox           R
> 57       05mar2008        Urine                 Amik           0.001-SS-HIDE
> 87       07sep2009        Blood                 Oxy            HIDE
> 62       12oct2007         Urine                Vanc           0.063-SS
> 62       12oct2007         Urine                Methc          0.063-SS
> 62       12oct2007         Urine                Vanc           R-HIDE
> 62       12oct2007         Blood                Amp            SS
>

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