Two variable in the mydata data frame are named Var1 and Var2. How do you tell a bivariate function, such as cor.test, which two variables you want to analyze?

How to name rows and columns in DataFrames and Matrices F in R?

Ournames is a character vector. What values does the statement below return to Cpeople? Cpeople <- ournames %in% grep("^C", ournames, value=TRUE)

How do you return "October" from x in this code? x<-as.Date("2018-10-01")

Which file contains settings that R uses for all users of a given installation of R?

If mdf is a data frame, which statement is true ?

Which command is used to test if an object is a time series?

Which of the following is NOT a valid data import function?

The entities on which R operates are technically known as:

What does the following R function output? abs(10 - 3 * 4)

How does one obtain the FIRST element of x when x <- 1:9?