[英]Adding an extra point in a ggplot2 graph
I have created a plot of the Sepal.Length and the Sepal.Width (using the iris dataset) with ggplot2.我用 ggplot2 创建了一个 Sepal.Length 和 Sepal.Width(使用虹膜数据集)的图。
ggplot(iris, aes(x = Sepal.Width, y = Sepal.Length, col = Species)) + geom_point()
Works fine but now I would like to add a seperate point to the graph with a blue color.工作正常,但现在我想用蓝色向图形添加一个单独的点。 So for example:
例如:
df = data.frame(Sepal.Width = 5.6, Sepal.Length = 3.9)
Any thoughts on how I can accomplish this?关于我如何做到这一点的任何想法?
Add another layer:添加另一个图层:
ggplot(iris, aes(x = Sepal.Width, y = Sepal.Length, col = Species)) +
geom_point() +
geom_point(aes(x=5.6, y=3.9), colour="blue")
Using annotate :使用注释:
ggplot(iris, aes(x = Sepal.Width, y = Sepal.Length, col = Species)) +
geom_point() +
annotate("point", x = 5.6, y = 3.9, colour = "blue")
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