Exercises
Auto dataset
- Install the R package
ISLR and load the dataset Auto. Be careful, as R is case-sensitive.
- Query the help file for information about the dataset.
- Look at the first lines of
Auto
- Create an explanatory variable
x with horsepower and mileage per gallon as response y.
- Create a scatterplot of
y against x. Is there evidence of a linear relationship between the two variables?
- Append a column vector of ones to
x and create a projection matrix.
- Check that the resulting projection matrix is symmetric and idempotent.