[R] ggplot2 - legend for fill coulours

Pedro de Barros pbarros at ualg.pt
Tue Apr 1 21:58:12 CEST 2008


Thanks a lot!

BTW, do you have any document explaining the object philosophy of 
ggplot? I was trying to see how you defined scale_fill_identity, but 
could not find it...

At 19:50 2008/04/01, hadley wickham wrote:
> >  However, it looks this works only when the data are in the sequence
> >  of the levels in the factor defining the fill colours. When the
> >  sequence is different, the legend gets "scrambled", in that the order
> >  of the colours does not match the labels.
>You can fix this by explicitly specifying the breaks to use in the
>identity scale:
>  + scale_fill_identity(labels=levels(plotdata2$group),
>That way there's no confusion about how the values and their labels match up.

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