[R] ggplot2 stacked line plot

[Jim Lemon]

On 02/08/2010 03:40 PM, Liam Blanckenberg wrote:
> Hi all,
>
> I have been hunting around for hours trying to figure out how to
> generate a stacked line chart using ggplot2. This type of chart can be
> generated in excel 2007 by selecting: Chart type>  Line>  Stacked
> line. I can generate a stacked area chart using the following code:
>
>     p<- ggplot2(~, aes(x = ~, y = ~, colour = Type)) +
> geom_area(aes(position = 'stack', fill = Type))
>
> However, when I try and replicate this using the following code for geom_line:
>
>     p<- ggplot(~, aes(x = ~, y = ~, colour = Type)) +
> geom_line(aes(position = 'stack'))
>
> the resulting plot is not stacked - i.e. each 'Type' is plotted at its
> actual value rather than cumulatively to form a stacked chart... I
> have poured through Hadley's ggplot2 book (ggplot2: elegant graphics
> for data analysis), the R help list and also done general google
> searching but cannot find a way to generate this type of plot.
>
> R version: 2.9.2
> ggplot2 version: 0.8.5
> OS: windows 7 (64-bit).
>
Hi Liam,
Are you looking for something like stackpoly (plotrix package)? It's not 
ggplot, but it might do what you want.

Jim