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1.
In R, which of the following functions is used to modify directly the object given as argument without assigning its result?
2.
What is the output of the following R code:
x < -1: 4
x > 2
x > 2
3.
In R, which of the following functions is used to return a vector that for each index location is the maximum across inputs?
4.
What is the output of the following R code:
x < -2
switch (x, x + x, mean(1: x), mean(x: x * x))
switch (x, x + x, mean(1: x), mean(x: x * x))
5.
In R, which of the following is false about matrices and arrays?
6.
In R, which of the following is not an atomic datatype?
7.
In R, which of the following functions works similar as the separate() function?
8.
In R, which of the following functions is used to plot the column of matrices?
9.
In R, which of the following are examples of heterogeneous data structures?
10.
In R, the ________________________ operator returns a single element which offers a flexibility of referring to the elements by position rather than by name.