R Questions Set 26:
Which function opens the screen graphics device for the Mac?
Solution:
The with() function is used to apply an expression for a given dataset.
Solution:
Which operator is used to connect multiple verb actions together into a pipeline?
Solution:
Which of the following lets you build interactive Flash or HTML5 charts?
Solution:
Pick the output of the code snippet.
> x <- 3
> switch(2, 2+2, mean(1:10), rnorm(5))
Solution:
The ________ function can be used to add datasets in R, provided that the columns in the datasets are the same.
Solution:
Parallel processing is done via a parallel package that can make the elapsed time smaller than the user time.
Solution:
Which of the following syntax is used to install the forecast package?
Solution:
Which of the following functions can be used to read CSV files in R?
Solution:
What will be the output of the following R code?
> centre <- function(x, type) {
+ switch(type,
+ mean = mean(x),
+ median = median(x),
+ trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")
Solution:
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