After the quick overview, here is a quick walkthrough to some categorical analysis. Open the app: Here 1. Import the data: Here are some homemade data, done with the following R code: set.seed(3467) x=1:400+rnorm(400,0,1) y1=x*2.5+40+rnorm(400,0,50) y2=x*4.5+80+rnorm(400,0,50) group=rep(c('G1','G2'),each=400) x=c(x,x) y=c(y1,y2) DF=data.frame(x=x,y=y,group=group) write.csv(DF,'DF.csv') Click on import data, select your data and set rownames to first column. You