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BIA-656 – Assignment
This problem involves the OJ data set which is part of the ISLR package.a)Create a training set containing a random
Problem 1
This problem involves the OJ data set which is part of the ISLR package.
a)Create a training set containing a random sample of 800 observations, and a test set containing the remaining
b)Fit a support vector classifier to the training data using cost=0.01, with Purchase as the response and the other variables as predictors. Use the summary() function to produce summary statistics, and describe the results
c)What are the training and test errorrates?
d)Use the tune() function to select an optimal cost. Consider values in the range 0.01 to 10.
e)Compute the training and test error rates using this new value for cost.
f)Repeat parts b) through e) using a support vector machine with a radial kernel. Use the default value for gamma.
g)Repeat parts b) through e) using a support vector machine with a polynomial kernel. Set degree=2.
h)Overall, which approach seems to give the best results on thisdata?