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Editorial Team
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Asked: 2026-06-05T05:27:01+00:00

I have the following simple R code. vect <- c(a = 4, b =

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I have the following simple R code.

vect <- c(a = 4, b = 7, c = 5)
pie(vect, labels = c("A", "B", "C"), col = c("#999999", "#6F6F6F", "#000000"))

that print the following pie chart

enter image description here

How do I modify the above code to print more detail on my pie chart, so that it look like this other one ?

enter image description here

Thanks for any reply !

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1 Answer

  1. Editorial Team

    My above comment in details:

    1. Create a dummy data frame for the example:

      vect <- data.frame(v=c(rep('a', 25), rep('b', 30), rep('c', 45)))

    2. Call ggplot for a pie-chart (coord_polar) based on the manual:

      p <- ggplot(vect, aes(x=factor(1), fill = factor(v))) + geom_bar(width = 1) + coord_polar(theta="y")

    3. Tweak it:

      p + opts(title = "Decision tree") + xlab('') + ylab('') + 
theme_bw() + scale_fill_grey(name = "Rankings")

    Resulting in:

    enter image description here

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