What is a project in RStudio for ?

• Manage/Store R code, objects in a directory  
• Save workspace
• Publishing (e.g. website, slides, book)
• Application development (i.e. software creation)

What is the fastest read/write package in R?

• data.table

The shortest code to select two columns of a dataset?

• dataset[,c(1,2)]

The following expression returns:

• 5 + NA

• NA

What does this mean?

dplyr::mutate()

Is there an easier way to create this object?

x <- c(1,2,3,4)

How about x = c(1:4)?

What is the difference between tibble and data.frame?

Use class()

vignette("tibble")

What package will interface R with Python?

reticulate

R interface to Python modules, classes, and functions. When calling into Python R data types are automatically converted to their equivalent Python types. When values are returned from Python to R they are converted back to R types. The reticulate package is compatible with all versions of Python >= 2.7. Integration with NumPy requires NumPy version 1.6 or higher.

R programmers like cats or dogs?

https://www.rforcats.net

Never see a website like that for dog lovers.

Prove me wrong.

Why use R for data science?

• It's for generalist

• Largest user community (only comparable to Python)
• Statistics
• Visualization
• Portable, lots of Interfaces (RCPP, reticulate)