Question

Use R to do the following. please provide the code

Import the data set `UScereal`, create a scatter plot of `calories` modeled by `sugars` using the `shelf` variable to create different plot characters.

Add a legend to indicate the shelf number. Is there any patterns? (Use base R plotting for this problem.)

Answer 1

The R code is

library(MASS)

with(UScereal,plot(calories,sugars,pch=1:3,cex=1.2,col=1:3))

legend( "topright" ,legend=1:3,cex=1.2,pch=1:3,col=1:3) # Here 1:3 denotes shelf number in legend

The scatter plot show positive association pattern between calories and sugars

It will be show positive moderate correlation between the calories and sugars