Answer Posted / Arun Kumar Shukla

In R, factors are the primary data structure used to store categorical variables. Factors consist of a series of unique levels and corresponding integers (the factor levels are encoded as integers for more efficient storage).

Given a vector of numbers, how would you turn the values into scientific notation?

103

How can you verify if a given object “X” is a matrix data object?

118

How will you convert a factor variable to numeric in r language?

148