Do you still remember the difference between an argument with and without default values? The usage section in the sd() documentation shows the following information: sd (x, na.rm = FALSE) This tells us that x has to be defined for the sd() function to be called correctly, however, na.rm already has a default value. Not specifying this argument won't cause an error. You can define default argument values in your own R functions as well. You can use the following recipe to do so: my_fun <- function (arg1, arg2 = val2) { body } The editor on the right already includes an extended version of the pow_two() function from before. Can you finish it? Ⓒ Instructions 70 XP • Add an optional argument, named print_info, that is TRUE by default. 2 3 # Finish the pow_two the pow_two() function pow_two <-function(x) { y <- x^2 print (paste(x, "to the power two equals", y)) return(y) 4 5 6} R Console Slides Notes Parsing error in script.R:7:17: unexpected assignment 6: } 7: if (print_info) ← - Parsing error in script.R:6:19: unexpected assignment 5 Run Code Submit Answer

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Do you still remember the difference between an argument with and
without default values? The usage section in the sd()
documentation shows the following information:
sd(x, na.rm = FALSE)
This tells us that x has to be defined for the sd() function to be
called correctly, however, na.rm already has a default value. Not
specifying this argument won't cause an error.
You can define default argument values in your own R functions as
well. You can use the following recipe to do so:
my_fun <- function(arg1, arg2 = val2) {
body
}
The editor on the right already includes an extended version of the
pow_two() function from before. Can you finish it?
Instructions
70 XP
• Add an optional argument, named print_info, that is TRUE by
default.
• Wrap an if construct around the print() function: this function
should only be executed if print_info is TRUE.
• Feel free to experiment with the pow_two() function you've just
coded.
HOME
1 # Finish the pow_two () function
pow_two <- function(x) {
5:
6:
2
3
y <- x ^ 2
print (paste(x, "to the power two equals", y))
5 return(y)
6 }
4
R Console
Slides Notes
Parsing error in script.R:7:17: unexpected assignment
6: }
7: if (print_info) ←
A
Parsing error in script.R:6:19: unexpected assignment
return(y)
if (print_info) ←
^
S
Run Code
Submit Answer
|
[
Transcribed Image Text:Do you still remember the difference between an argument with and without default values? The usage section in the sd() documentation shows the following information: sd(x, na.rm = FALSE) This tells us that x has to be defined for the sd() function to be called correctly, however, na.rm already has a default value. Not specifying this argument won't cause an error. You can define default argument values in your own R functions as well. You can use the following recipe to do so: my_fun <- function(arg1, arg2 = val2) { body } The editor on the right already includes an extended version of the pow_two() function from before. Can you finish it? Instructions 70 XP • Add an optional argument, named print_info, that is TRUE by default. • Wrap an if construct around the print() function: this function should only be executed if print_info is TRUE. • Feel free to experiment with the pow_two() function you've just coded. HOME 1 # Finish the pow_two () function pow_two <- function(x) { 5: 6: 2 3 y <- x ^ 2 print (paste(x, "to the power two equals", y)) 5 return(y) 6 } 4 R Console Slides Notes Parsing error in script.R:7:17: unexpected assignment 6: } 7: if (print_info) ← A Parsing error in script.R:6:19: unexpected assignment return(y) if (print_info) ← ^ S Run Code Submit Answer | [
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