Change shape and color of geom points in ggplot2

Question

Here is the issue, the following code is changing the color of the data points but not the shape. What is wrong?

g <- ggplot(mydata, aes(var1, var2)
g <- g + geom_point(aes(shape=var3, color=var3), shape=1)
g <- g + facet_grid(.~var4)
g <- g + theme(legend.position="bottom") + guides(colour = guide_legend(ncol = 1))

You have 2 times the argument shape once within aes() and once outside.Remove the one outside... Please also provide a reproducible example for any question here. — Gilles San Martin
– Gilles San Martin, Commented Sep 7, 2017 at 20:20

pogibas · Accepted Answer · 2017-09-07 20:32:01Z

2

Your code is almost correct. Why do you have two shapes?
Replace

geom_point(aes(shape=var3, color=var3), shape=1)

With

geom_point(aes(shape=var3, color=var3)

And this is how I would write it:

library(ggplot2)
ggplot(mydata, aes(var1, var2) +
    geom_point(aes(shape = var3, color = var3)) +
    facet_grid(. ~ var4) +
    theme(legend.position = "bottom") + 
    guides(colour = guide_legend(ncol = 1))

answered Sep 7, 2017 at 20:32

pogibas

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