The following reading provides a good overview of principal component analysis in R. You may find it helpful for this weeks homework.
more ...For those interested in understanding PCA better, I recommend the following optional reading:
And if you've become even slightly interested in Vim, you may be interested in reading this optional blog post:
more ...R's apply functions are the efficient way to perform repeated
operations on vectors of your data. There are many variants of the "apply"
statement as well as wrappers for special cases of these
functions easier. These notes will cover the apply statements and
wrappers that ...
Please watch the following videos by the beginning of class on Friday, June 27th:
Keith Baggerly's talk at the The Brad Efron Honorary Symposium on LARGE-SCALE INFERENCE
60 minutes' Deception at Duke: Fraud in cancer care?
Please read sections 1 through 3 of this article prior to class on Monday, June 20th:
J. B. Buckheit and D. L. Donoho, Wavelab and Reproducible Research.
more ...Today you will be practicing working with Git.
git init and then adding GitHub as
a remote or using GitHub to initialize a new repository and then cloning
it.Functions are an important tool for interacting with data in R. You're probably already familiar with the idea of functions from math classes. In R, we use functions to manipulate some input argument(s) and return some output arguments(s). You've already seen ...
more ...Here's a short summary of the basic workflow that we covered today. We'll be using it for homeworks, quizzez, etc. so it should start to come more naturally.
git pull command (in Bash)