[R] ggplot2 - geom_bar

[Matthias Rieber]

On 23.04.2012 20:55, Brian Diggs wrote:
> On 4/23/2012 9:24 AM, Matthias Rieber wrote:
>> Hello,
>>
>> I've some problem with the ggplot2. Here's a small example:
>>
>> [...]
>> Is it wrong to use geom_bar with that kind of data? I could avoid this
>> issue when I cast the data.frame, but I like to avoid that solution.
>
> There is nothing wrong with using bars with this sort of data. There
> is a bug in the faceting code of 0.9.0 that will be fixed in 0.9.1
> (see https://github.com/hadley/ggplot2/issues/443 ) which caused
> duplicate rows of data to be dropped when there was faceting. That is
> what you are seeing in the second example; row 6 is identical to row 7
> and is dropped before plotting.  One easy workaround until 0.9.1 comes
> out is to add unique column to the data that is otherwise ignored:
>
> molten <- data.frame(date=c('01','01','01','01',
>                             '02','02','02','02'),
>                      channel=c('red','red','blue','blue',
>                                'red','red','blue','blue'),
>                      product=c('product1','product2',
>                                'product1','product2',
>                                'product1','product1',
>                                'product1','product2'),
>                      value=c(1,1,1,1,
>                              1,1,1,1),
>                      dummy=1:8)
>

Thanks! That worked.

Matthias