Exercise 1: R vector operations
[This article was first published on R programming tutorials and exercises for data science and mathematics, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.
Find a function FUN that leads to the following output:
x <- 1:10 FUN(x) - FUN(-x) ## [1] 11
Hint: aim to keep the answer simple. The main logic of the function can often be summarized in a single line of R code.
Answer 1: click to reveal
We can write the function as follows:
FUN <- function(x) {
return(max(x))
}
Based on this definition of FUN we get:
FUN(x) ## [1] 10 FUN(-x) ## [1] -1
We finally confirm that this function solves the puzzle:
FUN(x) - FUN(-x) ## [1] 11
Answer 2: click to reveal
Another solution to this puzzle is:
FUN <- function(x) {
return(min(x))
}
Based on this definition of FUN we get:
FUN(x) ## [1] 1 FUN(-x) ## [1] -10
We confirm that this function solves the puzzle:
FUN(x) - FUN(-x) ## [1] 11
To leave a comment for the author, please follow the link and comment on their blog: R programming tutorials and exercises for data science and mathematics.
R-bloggers.com offers daily e-mail updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.
Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.