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peterhurford / r-interview.md

Last active January 12, 2022 21:55

R Interview Questions

1.) If I have a data.frame df <- data.frame(a = c(1, 2, 3), b = c(4, 5, 6), c(7, 8, 9))...

1a.) How do I select the c(4, 5, 6)?

1b.) How do I select the 1?

1c.) How do I select the 5?

1d.) What is df[, 3]?

jimbojsb / gist:1630790

Created January 18, 2012 03:52

Code highlighting for Keynote presentations

Step 0:

Get Homebrew installed on your mac if you don't already have it

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)