Plotting points with color and shape based on data variables

colors, plot, r, shapes, variables

Solution

One of the domain where `ggplot2` excels , comparing to other R system plots, is mapping plot parameters to data variables.( via aesthetics mechanism)

library(ggplot2)
dat <- data.frame(X =runif(20),
                     Y =runif(20),
                     att1 = gl(5,20/5),
                     att2 =gl(3,20/3))
ggplot(dat,aes(x=X,y=Y,color=att1,shape=att2)) +
    geom_point(size=5)

You can do it in the base plot also, but you should generate manually the legend ...

plot(dat$X,dat$Y,pch=as.integer(dat$att1),col=as.integer(dat$att1))

Problem

I am trying to make a scatter plot with the colors of each point corresponding to one variable and the shape of each point corresponding to another variable. Here is some example data and the code I used to make the second plot: ``` Example data:(of 3 points) X Y att1 att2 .5 .5 1 A .24 .8 3 B .6 .7 5 C code:(for image2) > plot(X,Y, col=statc[att2], pch = 15) > legend("right", statv, fill=statc) Where: > statv [1] "A" "B" "C" > statc [1] "red" "blue" "orange" ``` I have done this individually but dont know how to do both. Here is two plots: 1 2 For example: I want the colors to apply to the points with the same att1 and the shapes to apply to points with the same att2

Original source