Quizzes/Polls

Hotkey to jump to the beginning of the line.

Hotkey to delete all characters from the current cursor position to the end of the line.

Hotkey to delete a full line which I am currently editing.

What is the command to load data from a package?

Which of data structures can store more than a single data type?

Which of the following symbols are not valid variable names and why?

• x .x X1 1X

• hello world helloworld

• i in f for

Which operators are asignment operators?

Which of the following operators are logical operators so return either TRUE or FALSE?

• = ==

• <= <-

• %in% %*%

• + -

What terms are the conditionals?

What terms are loop expressions?

Command to declare a function

What is the prefered order of arguments in the function declaration?

To use the value of a function outside of that function what would you use at the end of your function?

The dim for a data frame returns?

To display the data from a data frame `df` for the column `col` in a sorted manner, what is the right statement to do so?

To summarize a column of a vector by one ore more categories we use?

What is the command to combine two data frames by a column which have the same set of values?

What is the command you would use as the first command on the command line to get the sum of all row values for a matrix?

To display tables with more than 2 dimensions we use:

To write a single data frame to the file system in a compressed compact file we use ...