R Questions Set 21:
Which R package combines multi-dimensional arrays?
Solution:
R code can be tested using the testthat package.
Solution:
How do you check whether an R object is NULL?
Solution:
Command lines entered at the console are limited to about _____ bytes.
Solution:
Which R function lists all values of a variable with their frequencies?
Solution:
Which of these R functions does NOT allow you to create a matrix?
Solution:
Which of the following functions merges two variables into one?
Solution:
You have a 2x2 matrix called M which looks like this:
23 | 41
55 | 77
How do you access the number 41 in the matrix?
Solution:
Which of the following statements finds the maximum value for each column in a data frame?
Solution:
When the mean (μ) is ___ and the standard deviation (σ) is ___, we say that the random variable has a standard normal distribution.
Solution:
Related Question Sets:
Related Topics:
Scroll to Top
