Basic R functions and design patterns

0.01MB. 0 audio & 0 images. Updated 2015-08-25.

Description

Basic R functions, immediately useful but liable to be too basic for people who have already used the language. For more information and decks, please see: http://andrewtmckenzie.com/sr/

Sample (from 40 notes)

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Front	In R, what does !u mean?
Back	evaluates the logical negation of u
Tags

Front	In R, what does the command a:b output?
Back	the vector [a, a+1, ..., b] > abbreviation for seq(a,b,1), or just seq(a,b) since n defaults to 1, a la python
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Front	In R, how do you combine the vectors n and s? > n = c(2, 3, 5) > s = c("aa", "bb", "cc", "dd", "ee")
Back	via c(n, s) > [1] "2" "3" "5" "aa" "bb" "cc" "dd" "ee"> think: c stands for "concatenate"
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