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Basic R functions and design patterns

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


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
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
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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