Level 1 Lecture2

4 power 2 equal 16 how to make this calculation in R?

• 4^2

• 4**2

• None of the them

• Both of them

which function creates vector?

• vector( )

• vec( )

• c( )

• All of the Above

if a vector called vec contains 4 items in the follwoing order

30, "Apples", 20, "Bananas"

what what is the result of this

vec[1]

• 30

• "30"

• "Apples"

• 20

Choose the correct statement(s)

you can choose more than one answer

• matrix two dimension

  vector one dimension

• matrix one dimension

  vector two dimension

• matrix can hold different types of data

  vector can't hold different types of data

• Both vectors and matrices hold only one type of data

Which statement(s) is true about dataframe structure in R

You can choose more than one answer

• Different columns in dataframe should hold the same data type

• Different columns in dataframe can hold different data types

• Each column can contains different data type

• Each column should contain single data type