Summary: Inf-22803

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  • quiz 1

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  • What’s an object in R?

    A name thatyou can use to call up stored data.
  • What is the result if running the following code in the R studio console?my_num <- 1:6my_num

    1 2 3 4 5 6
  • A function in R has three basic parts. Which of the following choices is NOT one of them?

    Function
  • Suppose you define a function with arguments, such as:roll <- function(bones) {x=bones}This function will give an error if you call it without a value for the argument bones.How can you prevent this error, even when you forget giving the argument a value?

    Give the argument a default value
  • In R programming, you need to use a file to save R code in. What is this file called? 

    Script
  • Suppose we have a function: roll <- function(bones = 1:3) {    dice <- sample(bones, size = 2, replace = TRUE)    result <- sum(dice)}What is the range of all the possible values of ‘result’ after running this code?

    [2,6]
  • There are many design tools in R that can help people analyze data. You could directly call the functions after importing these tools. What are such tools called?  

    Package
  • Suppose we have a function as follows:work <- function(x) {    all<- sample(x, size = 2, replace = TRUE)    sum(all)}We need to call this function. Which of the following code will NOT work?work(1)work(1:10)work()work(x=1:10)

    work()
  • What will happen if we write and run the following code in the R console? ?sample

    Some help information is shown
  • What will happen after running the following code:install.packages("ggplot2")

    Install a library called ggplot2 in the platform
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