Scatterplots in Base R
Completion requirements
Here we introduce scatterplots in base R. The codes are simple, but you should also remember the options that make the plots more informative, like adding colors, legends, and error bars.
Continuous Data
Pairwise Relationships
There are times that you want to explore a large number of relationships. A number of relationships can be plotted at one time using the pairs command. The idea is that you give it a matrix or a data frame, and the command will create a scatter plot of all combinations of the data.
> uData <- rnorm(20)
> vData <- rnorm(20,mean=5)
> wData <- uData + 2*vData + rnorm(20,sd=0.5)
> xData <- -2*uData+rnorm(20,sd=0.1)
> yData <- 3*vData+rnorm(20,sd=2.5)
> d <- data.frame(u=uData,v=vData,w=wData,x=xData,y=yData)
> pairs(d)
Figure 5. Using pairs to produce all permutations of a set of relationships on one graph.