A scatter plot is the simplest plot that visualizes the relationship pattern between numeric variables. In this recipe, we will see how we can produce a scatter plot of two numeric variables conditional on a categorical variable.
The dataset used for this recipe is as follows:
# Set a seed value to make the data reproducible set.seed(12345) qqdata <-data.frame(disA=rnorm(n=100,mean=20,sd=3), disB=rnorm(n=100,mean=25,sd=4), disC=rnorm(n=100,mean=15,sd=1.5), age=sample((c(1,2,3,4)),size=100,replace=T), sex=sample(c("Male","Female"),size=100,replace=T), econ_status=sample(c("Poor","Middle","Rich"), size=100,replace=T))