Calculate the Cumulative Minima of a Vector in R Programming – cummin() Function

cummin() function in R Language is used to calculate the cumulative minima of the values of vector passed as arguments.

Syntax: cummin(x)

Parameters:
x: numeric object

Example 1:

# R program to cumulative minima

# Calling cummin() function
cummin(2:6)
cummin(-2:-6)
cummin(1.8:4.2)

Output:

[1] 2 2 2 2 2
[1] -2 -3 -4 -5 -6
[1] 1.8 1.8 1.8

Example 2:

# R program to cumulative minima

# Creating vectors
x1 <- c(3, 6, 4, 2, 6, 7)
x2 <- c(-4, 6, 3)

# Calling cummin() function
cummin(x1)
cummin(x2)

Output:

[1] 3 3 3 2 2 2
[1] -4 -4 -4

Since, the minima is calculated for the values in increasing order and hence the above code shows two cumulative values for first vector.