title	permalink	layout
R Programming	/rprog/	page

Getting Started

Programming Assignments

Strategy for Coding the Programming Assignments
Tutorial for those struggling with Programming Assignment 1
Breaking Down pollutantmean
Assignment 1: A More Elegant Solution
A SAS Version of pollutantmean?
Tutorial for those struggling with Programming Assignment 2
Tutorial for those struggling with Programming Assignment 3
PA1-test: testthat, Unit Tests for Programming Assignment 1
PA3-test: testthat, Unit Tests for Programming Assignment 3
Alternative submit script for Programming Assignment 1 that makes submitting more convenient by allowing selection of multiple parts plus prompting if user wants to submit another part before exiting
Grading the SHA-1 Hash Code
Assignment 2: Demystifying makeVector
Assignment 2: makeCacheMatrix as an Object

Some notes on the R Language
A Data Frame is Also a List
S Objects, R Objects, and Lexical Scoping
Common R Mistakes: Overwriting Functions with Data Objects
Forms of the Extract Operator
Functions to Sort Data Frames
Creative Use of R: Downloading Course Lectures Article illustrating how to use R to automate the download of lectures from Data Science Specialization courses, such as R Programming. Techniques used in this article are helpful to make research reproducible, as required for courses like Getting and Cleaning Data and Reproducible Research.
Lexical Scoping and Statistical Computing Article by Robert Gentleman and Ross Ihaka at the University of Auckland describing how lexical scoping works, and why it is valuable in statistical computing.
Data Science Job Report 2017: R Passes SAS, But Python Leaves Them Both Behind Bob Muenchen's take on the job market for various data science langauges.

R Onboarding for SAS Users Provides an overview and links to a variety of resources to help people with SAS experience make the transition to R
Commercial Statistics Packages: An Historical Perspective
Why is R More Difficult than SAS?
Thinking in R versus Thinking in SAS