[R] Reorganize data fram

[Dennis Murphy]

Hi:

Try the cast() function in the reshape package. Using d as the name of
your data frame,

library(reshape)
cast(d, Date ~ Category, value = 'Temperature')
     Date  A  B  C
1 2007102 16 17 18

HTH,
Dennis


On Tue, Jul 12, 2011 at 5:42 AM, anglor <angelica.ekenstam at dpes.gu.se> wrote:
> Hi,
>
> I have a data frame of about 700 000 rows which look something like this:
>
> Date        Temperature  Category
> 2007102   16                   A
> 2007102   17                   B
> 2007102   18                   C
>
> but need it to be:
>
> Date          TemperatureA  TemperatureB   TemperatureC
> 2007102       16                 17                    18
>
> Any suggestions?
>
> /Angelica
>
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