Re: [R] statistic test plot

If you type: class(z.ex) you'll see that your z-test produces an object with a class "htest." Then type: methods("plot") you'll get a list of all the types of objects that the plot() function knows how to make plots for. It doesn't look like plot has a sub- method for an htest object,

[R] statistic test plot

Hi, I am a beginner in R and is trying to plot some dot plot from t test result. I was following the example ## Example from z.test -- requires TeachingDemos package # library(TeachingDemos) # z.ex <- z.test(rnorm(25,100,5),99,5) # z.ex # plot(z.ex) but encounter this error for the last command