Problem 42633. Cumulative maximum of an array

• Created by Matthew Eicholtz
• Appears in 2 groups

×

By solving this problem, you will make progress in the following group(s)

Matrix Manipulation III

• 20 Problems
• 26 Finishers

Tough Stuff

• 19 Problems
• 7 Finishers

Like (1)

Difficulty:

(19)

Rate

• Solve Later   
• Add To GroupÂ

Find the cumulative maximum of an array without using the built-in function cummax (and a few others). Your function should act identically to cummax, allowing the same inputs.

Examples

If X = [0 4 3

6 5 2]

cumax(X,1) is [0 4 3 and cumax(X,2) is [0 4 4

6 5 3] 6 6 6]

cumax(X,1,'reverse') is [6 5 3 and cumax(X,2,'reverse') is [4 4 3

6 5 2] 6 5 2]

Also,

cumax([8 9 1 10 6 1 3 6 10 10]) returns [8 9 9 10 10 10 10 10 10 10]

cumax([8 9 1 10 6 1 3 6 10 10]') returns [8 9 9 10 10 10 10 10 10 10]'

See also cumin.

Solve

Solution Stats

17.01% Correct | 82.99% Incorrect

• 241 Solutions
• 38 Solvers

Last Solution submitted on Oct 08, 2025

Last 200 Solutions

Solution Comments

Problem Recent Solvers38

Suggested Problems

• Making change

  3434 Solvers

• Find state names that end with the letter A

  1189 Solvers

• Which quadrant?

  351 Solvers

• Reverse the elements of an array

  1076 Solvers

• Convert Two Character String into a Binary Vector

  215 Solvers

More from this Author44

• Repeat middle rows and columns of an array

  37 Solvers

• Numeric array to cell array of strings (easy)

  58 Solvers

• Create an 8-color version of an image

  60 Solvers

• Maximum of each diagonal

  64 Solvers

• Find the nearest prime number

  647 Solvers