In this tutorial, we will look at how to get the square root for a number (or values in a vector) in R with the help of some examples.
How to get the square root of a number in R?
You can use the built-in math function
sqrt() to get the square root (also called the root) of a number in R. Pass the number for which you want to get the square root as an argument to the
sqrt() function. The following is the syntax –
It returns the square root of the passed number. Note that you can apply the
sqrt() function to a numeric vector, array, matrix, and a dataframe as well.
Let’s look at some examples of using the
sqrt() function in R.
Get the square root of a number in R
First, we will apply the
sqrt() function directly to a number, for example, 4.
# sq root of 4 print(sqrt(4))
We get the square root of 4 as 2, which is the correct answer.
Square root of each value in a vector
You can similarly apply the
sqrt() function to a numeric vector in R. Note that individual values in R can be regarded as a vector of length one. If you apply the
sqrt() function to a numeric vector, it will compute the square root for each value in the vector.
Let’s look at an example.
# sq root of values in a vector vec <- c(1, 4, 9, 16, 25) print(sqrt(vec))
 1 2 3 4 5
You can see that we get a vector with the square root for each value in the passed vector. We get 1, 2, 3, 4, and 5 as the square root values for the numbers 1, 4, 9, 16, and 25 respectively.
You might also be interested in –
- Calculate Median of a Vector in R
- Get the Maximum value in an R Vector
- Get the Minimum Value in an R Vector
Subscribe to our newsletter for more informative guides and tutorials.
We do not spam and you can opt out any time.