[R] How to add legend to 2 different data frame overplot?

[Jim Lemon]

Hi C W,
I would guess you are trying to use the base graphics "legend" function.
Have you tried one of the scale_* functions in ggplot?

Jim


On Sat, Oct 31, 2015 at 3:10 PM, C W <tmrsg11 at gmail.com> wrote:

> Hi,
>
> I am trying to do add a legend to an overplot, something like this:
>
> ggplot() +
>     geom_density(data = df1, aes(x = x), fill = "green", show_guide =
> FALSE) +
>     geom_area(data = df2, aes(x = x), fill = "yellow", show_guide = FALSE)
> +
>     scale_color_manual(values = c("green", "yellow"), labels = c('df1',
> 'df2'))
>
> But the legend doesn't actually show up when I plot it.  How should I fix
> this?
>
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>
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