Built-in Function in R Programming Language

User-defined Functions in R Programming Language

Built-in Function are the functions that are already existing in R language and you just need to call them to use.

Here we will use built-in functions like sum(), max() and min().

R

# Find sum of numbers 4 to 6.
print(sum(4:6))
 
# Find max of numbers 4 and 6.
print(max(4:6))
 
# Find min of numbers 4 and 6.
print(min(4:6))

Output

[1] 15
[1] 6
[1] 4

Other Built-in Functions in R:

Let’s look at the list of built-in R functions and their uses:

Functions	Syntax
Mathematical Functions
abs()	calculates a number’s absolute value.
sqrt()	calculates a number’s square root.
round()	rounds a number to the nearest integer.
exp()	calculates a number’s exponential value
log()	which calculates a number’s natural logarithm.
cos(), sin(), and tan()	calculates a number’s cosine, sine, and tang.
Statistical Functions
mean()	A vector’s arithmetic mean is determined by the mean() function.
median()	A vector’s median value is determined by the median() function.
cor()	calculates the correlation between two vectors.
var()	calculates the variance of a vector and calculates the standard deviation of a vector.
Data Manipulation Functions
unique()	returns the unique values in a vector.
subset()	subsets a data frame based on conditions.
aggregate()	groups data according to a grouping variable.
order()	uses ascending or descending order to sort a vector.
File Input/Output Functions
read.csv()	reads information from a CSV file.
Write.csv()	publishes information to write a CSV file.
Read. table()	reads information from a tabular.
Write.table()	creates a tabular file with data.

Functions in R Programming

A function accepts input arguments and produces the output by executing valid R commands that are inside the function.

Functions are useful when you want to perform a certain task multiple times.

In R Programming Language when you are creating a function the function name and the file in which you are creating the function need not be the same and you can have one or more functions in R.

Built-in Function in R Programming Language

R

Other Built-in Functions in R:

Functions in R Programming

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