Since DAT$301$ is the prerequisite, this course assumes prior familiarity with the R programming language.

The first couple of questions are just a warm$-$up in $R$ syntax.

Question $1$

Create a variable $x$ as a vector of first $100$ natural numbers $1,2,3,$dots,$100$

In addition, create a variable $y$ as a vector of squares of first natural numbers: $1^2,2^2,3^2,$dots,${100}^2.$

# your code here

fail$()$ # No Answer $-$ remove if you provide an answer

# check whether you created vectors $x$ and $y,$ which are numeric and of length $100$

library$($testthat$)$ #in case you forgot to run the first cell $($but please run it anyways$)$

if $($test$\_$that $",$

expect$\_$equal$($is$.$vector $(x),$ TRUE$)$

expect$\_$equal$($is$.$vector$($y$),$ TRUE$)$

$\})!=$ TRUE$)$ stop $("$Sorry$,x$ or $y$ was not created as a vector"$)$

if $($test$\_$that $($desc$="",$

expect$\_$equal $($is$.$numeric $(x),$ TRUE$)$