Correct Answer: [1] "O M G"
Explanation:
Note: This Question is unanswered, help us to find answer for this one
R Skill Assessment
Your Skill Level: Poor
Retake Quizzes to improve it
More R MCQ Questions
Which is NOT the parameter of command seq()?
Which is an invalid way to return the mean of each variable in a numeric data frame?
Given x <- c(1:3,NA), the command: (x+1)[(!is.na(x)) & x>0] -> z generates:
Which class avoids making copies of objects?
What is the output of matrix(1:10, nrow=2)[2,2]?
Arrays are similar to matrices in R, but are different in what respect?
Let X be a n-dimension vector. Which call tests this particular statement: "no value of X is NA"
What is the output of the following calculation? t(c(1, 1)) %*% c(1, 1)
Suppose we have defined a list object, "X", which has 3 components. Each component is a vector with at least 5 elements. Which command will extract the fourth (4th) element from the third (3rd) component of our list?
matrix(1:4, ncol = 2)[1,]