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What is the cumsum() function in R?

Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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Overview

The cumsum() function in R computes the cumulative sum of elements in a vector object.

Syntax

cumsum(x)
The syntax for the cumsum() function

Parameter value

The cumsum() function takes a single parameter value, x, which represents a numeric or complex object.

Return value

The cumsum() function returns a vector of the same length as x.

Example

# implementing the cumsum() function to take the sum of elements in the vector objecs
cumsum(1:10)
cumsum(c(2, 3, 1, -4, 2))
Implementing the cumsum() function

Explanation

  • Line 2: We obtain the cumulative sum of numbers starting from 1 to 10 using the cumsum() function.
  • Line 3: We obtain the cumulative sum of random numbers of a vector object using the cumsum() function.

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CONTRIBUTOR

Onyejiaku Theophilus Chidalu

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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