R help - Oct 2015 - How to add legend to 2 different data frame overplot?

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?

	[[alternative HTML version deleted]]

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?
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
	[[alternative HTML version deleted]]

Remove show_guide = FALSE?
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On October 30, 2015 9:10:31 PM PDT, 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?
>
>	[[alternative HTML version deleted]]
>
>______________________________________________
>R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.