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Compute Single Order Integral value of a Function in R Programming - integrate() Function

Last Updated : 30 Jun, 2020
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integrate() function in R Language is used to compute single order integral of the function provided.
Syntax: integrate(f, lower, upper) Parameters: f: represents a function lower: represents lower limit of integration upper: represents upper limit of integration
To know about more option parameters, use below command:
help("integrate")
Example 1: r
# Create function
f<-function(x) x^3 + 2*x

# Integrate from 0 to 1
integrate(f, 0, 1)
Output:
1.25 with absolute error < 1.4e-14
Example 2: r
# Create function
f <- function(x) {1/((x+1)*sqrt(x))}

# Integrate from 0 to 5
integrate(f, lower = 0, upper = 5)
Output:
2.300524 with absolute error < 0.00011

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