# [R] ggplot: add percentage for each element in legend and remove tick mark

John Kane jrkr|de@u @end|ng |rom gm@||@com
Fri Aug 13 15:21:17 CEST 2021

```Would you supply some sample data please? A handy way to supply sample
data is to use the dput() function. See ?dput.  If you have a very
large data set then something like head(dput(myfile), 100) will likely
supply enough data for us to work with.

On Thu, 12 Aug 2021 at 11:45, Kai Yang via R-help <r-help using r-project.org> wrote:
>
> Hello List,
> I use the following code to generate a donut plot.
> # Compute percentages
> eth\$fraction = eth\$individuals / sum(eth\$individuals)
> # Compute the cumulative percentages (top of each rectangle)
> eth\$ymax = cumsum(eth\$fraction)
> # Compute the bottom of each rectangle
> eth\$ymin = c(0, head(eth\$ymax, n=-1))
> # Make the plot using percentage
> ggplot(eth, aes(ymax=ymax, ymin=ymin, xmax=4, xmin=3, fill=ethnicity)) +
>   geom_rect() +
>   coord_polar(theta="y")  +
>   xlim(c(2, 4)
>   )
>
> I want to improve the plot for two thing:
> 1. the legend: I need to add percentage (eth\$fraction * 100 and then add %) for each of element.
> 2. remove all number (tick mark ?) around the plot
> Thank you,
> Kai
>
>         [[alternative HTML version deleted]]
>
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--
John Kane