In this tutorial, we will look at how to use the built-in ceiling() function in R with the help of some examples.
What does the ceiling() function do in R?
You can use the built-in math function, ceiling() to get the smallest integer greater than or equal to a given number in R. Pass the number for which you want to get the ceiling as an argument to the ceiling() function. The following is the syntax –
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ceiling(x)
If you pass an integer to the ceiling() function, you’ll get the same value as the output. Note that you can apply the ceiling() function to a numeric vector, array, matrix, and a dataframe as well.
Examples
Let’s look at some examples of using the ceiling() function in R.
Apply ceiling() function to a number
First, let’s look at some examples of using the ceiling() function on a positive real number.
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# ceiling for a positive real number print(ceiling(3.2)) print(ceiling(3.4)) print(ceiling(3.7))
Output:
[1] 4 [1] 4 [1] 4
You can see that we get the same output, 4 for the values, 3.2, 3.4, and 3.7. Notice that 4 is the smallest integer that is greater than or equal to the above values and thus we get 4 as the output for all the values in the above example.
Let’s now apply the ceiling function to negative real numbers.
# ceiling for a negative real number print(ceiling(-3.2)) print(ceiling(-3.4)) print(ceiling(-3.7))
Output:
[1] -3 [1] -3 [1] -3
We get -3 as the result for the numbers, -3.2, -3.4, and -3.7. Here, -3 is the smallest integer that is greater than or equal to all the passed values.
Apply ceiling() function to a numeric vector
You can similarly apply the ceiling() function to a numeric vector in R. If you apply the ceiling() function to a numeric vector, it will compute the ceiling for each value in the vector.
Let’s look at an example.
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# ceiling for a numeric vector vec <- c(0, 1.3, -1.3, 2.5, 3.1) print(ceiling(vec))
Output:
[1] 0 2 -1 3 4
You can see that we get the ceil (or the ceiling value) for each value in the numeric vector.
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
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