CODEWITHSUNDEEP
rvector
Sabrina
Sabrina

Reputation: 3

R: how to include a character between two repeted items in R?

I am new to R and have a few questions about vectors.

I need help creating a vector n containing two copies of vector x, separated by a 0.

I wrote the following code, but missing the ´0´part:

x<-c(3,10,30)


n=rep(x, times=2)

n

In addition, how to check if the content of two vectors is equal? And finally, how do I check for the length of a vector?

Upvotes: -3

Views: 39

Answers (1)

BHudson
BHudson

Reputation: 707

1c: If you just need a 0 between two vectors, you can use the c() function to combine multiple objects together. In this case, we can make two copies of x with a 0 in-between them like so - c(x,0,x)

2: R lets you check whether two things are equal in multiple ways. It sounds like your professor wants you to use the == approach, which checks if each element of two things are the same. As the next question notes though, doing that when they aren't the same length is possibly problematic - which element is the start, etc. Just something to be aware of. You can use if two things are identical though with identical()

3: There is a function you can use for this. length() tells you how many elements are in an object. Just for fun, we can the == approach here to see if the lengths are equal (we know that R should tell use FALSE of course)

x<-c(3,10,30)
x

m=rep(x, each=2)
m

n=rep(x, times=2)
n

# question 1c
n <- c(x, 0, x)
n

# Question 2: Is the content of m equal to the content of n?
n == m

# Question 3: How can you check the length of both vectors?
length(n)
length(m)

length(n) == length(m)

Upvotes: 1

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