How would you create a factor in r?
What is a random walk model?
Give some examples of the functions in stringr.
How would you write a custom function in r? Give an example.
How do you build and evaluate a random forest in r?
How would you do a cross-product of two tables in r?
What are the steps to build and evaluate a linear regression model in r?
What is the difference between a bar-chart and a histogram?
What do you know about the rattle package in r?
What is the difference between a bar-chart and a histogram? Where would you use a bar-chart and where would you use a histogram?
Given a vector of numbers, how would you turn the values into scientific notation?
How would you facet the data using ggplot2 package?
How would you find out the mean of one column with respect to another?
Tell me something about shinyr.
How can you simulate random walk model using r?
