islp's Introduction

islp

Solutions to 'An Introduction to Statistical Learning with Applications in R'... in Python!

HOW TO

Installation

install anaconda, and create env based on environment.yml

From scratch

create anaconda env 'islp', python 3.5

source activate islp

pip install jupyterlab

pip install numpy

pip install pandas

pip install matplotlib

pip install sklearn

pip install seaborn

pip install ipywidgets (so that seaborn import warning goes away)

pip install mkdocs

pip install mkdocs-cinder pip install pymdown-extensions #for latex

pip install mlxtend

pip install statsmodels

Windows

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islp's Issues

Exercise 4.1 equation (2) typo in one of the intermediate steps

Exercise 4.1 equation (2), exp(Y) / (1 + exp(Y)) is missing from one of the intermediate steps.

Simplify Ch3 Exercise 8 (a) IV

First off all, thank you for your work in making these solutions available in python in such an elegant format. It has helped me a lot in my studies!

In your answer to chapter 3 exercise 8 part a question iv, you ask

This exercise is a bit trickier to do in Python, since there's no standard out-of-the-box function for it (please let us know if you could find one).

statsmodels now provides this functionality (where res is the result of the model fit):

pred = res.get_prediction(exog={'horsepower':98})
pred.summary_frame(alpha=0.05)

This returns a dataframe with one row per prediction (in this case only 1 row) with all the values that we need (and matching exactly your current answer)
mean_ci_[lower|upper] is the confidence interval
obs_ci_[lower|upper] is the prediction interval

        mean   mean_se  mean_ci_lower  mean_ci_upper  obs_ci_lower  obs_ci_upper
0  24.467077  0.251262      23.973079      24.961075     14.809396     34.124758

Happy to submit a PR if you'd like to see this changed

4.4a Math Is Incorrect

Proposing #7 PR to close. Let me know if I am wrong though. Thanks guys

Exercise 6.3 d missing

Answer for exercise 6.3 part d is missing (the answer probably have similar reasoning as part a), and the answer for part e is written under part c instead of the header part e.

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