Copy of Assignment 3.txt

# Copy of Assignment 3.txt - display the dataset check the...

• Homework Help
• 2

This preview shows pages 1–2. Sign up to view the full content.

### display the dataset, check the dimension of the dataset train test fix(train) fix(test) ### you can use "lm" function to model the data (x,y) using polynomials ### remember to specify your model using poly(x,d)where d is the highest degree of your desired degree of your polynomial model ### for example, poly(x, 2) will fit a model with quadratic coefficients ## poly(x, 1) shown below will fit a model with simple linear coefficients model <- lm(y ~ poly(x,1),data=train) ### you can look up for details of the model summary(model) model2 <- lm(y ~ poly(x,2),data=train) model3 <- lm(y ~ poly(x,3),data=train) model4 <- lm(y ~ poly(x,4),data=train) model5 <- lm(y ~ poly(x,5),data=train) summary(model2) summary(model3) summary(model4) summary(model5) ### compute the training error msetrain=mean((train\$y-fitted(model))^2) msetrain2=mean((train\$y-fitted(model2))^2) msetrain3=mean((train\$y-fitted(model3))^2) msetrain4=mean((train\$y-fitted(model4))^2) msetrain5=mean((train\$y-fitted(model5))^2) ### use this model to fit data in test set

This preview has intentionally blurred sections. Sign up to view the full version.

This is the end of the preview. Sign up to access the rest of the document.
• Fall '16

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern