This is an example for calculating Body Mass Index using height and weight. The first line sets the working directory in which the CSV file is located. setwd(“C:/Users/123/Documents/R”) temp <- read.csv(file=”practice_data.csv”,header=TRUE,sep=”,”) bmi=temp$weight/temp$height bmi   This is the CSV file, practice_data.csv. Name,height,weight John,1.6,50 Mary,1.7,55 Ed,1.5,44 David,1.3,65