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Divide by 4

Given the variable x as your input, divide it by four and put the result in y.

6 years ago

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Add 7

Given an input variable x, output a variable y that is 7 greater than x. Example: Input x = 1 Output y is 8 Input ...

6 years ago

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vectorization in N

For a given integer n (n>1), compute the sum f (i) (1 <= i <= n) where f (i) = 1 if n is odd and 2 otherwise.

6 years ago

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sum of first 'n' terms

Given n=10, find the sum of first 'n' terms Example: If n=10, then x=1,2,3,4,5,6,7,8,9,10. The sum of these n=10 terms is 55...

6 years ago

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Generate a NaN...on purpose

The goal is to create a function that will return a single "NaN" without using the nan function. I am interested to see how many...

6 years ago

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Back to basics 15 - Benchmark

Covering some basic topics I haven't seen elsewhere on Cody. Return an array of the benchmark values for MATLAB.

6 years ago

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Flip the main diagonal of a matrix

Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...

6 years ago

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Back to basics 20 - singleton dimensions

Covering some basic topics I haven't seen elsewhere on Cody. Remove the singleton dimensions from the input variable (e.g. if...

6 years ago

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Check if number exists in vector

Return 1 if number _a_ exists in vector _b_ otherwise return 0. a = 3; b = [1,2,4]; Returns 0. a = 3; b = [1,...

6 years ago

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I've got the power! (Inspired by Project Euler problem 29)

Consider all integer combinations of a^b and b^a for the integer values 2 ≤ a ≤ 4 and 2 ≤ b ≤ 5: 2^2=4, 2^3=8, 2^4=16,...

6 years ago

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Triangle sequence

A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

6 years ago

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Implement simple rotation cypher

If given a letter from the set: [abc...xyz] and a shift, implement a shift cypher. Example: 'abc' with a shi...

6 years ago

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Polite numbers. Politeness.

A polite number is an integer that sums of two or more consecutive positive integers. Politeness of a positive integer is a num...

6 years ago

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Find the 9's Complement

Find the 9's complement of the given number. An example of how this works is <http://electrical4u.com/9s-complement-and-10s-c...

6 years ago

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Kaprekar numbers

Test if the input is a Kaprekar number: <http://mathworld.wolfram.com/KaprekarNumber.html>. Return a logical true or false. ...

6 years ago

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Smith numbers

Return true if the input is a Smith number in base ten. Otherwise, return false. Read about Smith numbers at <http://en.wikipedi...

6 years ago

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Bell Number calculator

Calculate a vector of Bell numbers for sets up to length n. Bell numbers are the maximum number of partitions of a set. See the ...

6 years ago

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Make a checkerboard matrix

Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

6 years ago

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Reverse Run-Length Encoder

Given a "counting sequence" vector x, construct the original sequence y. A counting sequence is formed by "counting" the entrie...

6 years ago

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Kaprekar Steps

6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

6 years ago

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Counting Sequence

Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

6 years ago

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Matlab Basics - Create a row vector

Write a Matlab script to create a row vector of 10 consecutive numbers x = [1 2 3 4 5 6 7 8 9 10]

6 years ago

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Matlab Basics - Absolute Value

Write a script that returns the absolute value of the elements in x e.g. x = [-1 -2 -3 -4] --> y = [1 2 3 4]

6 years ago

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Area of a Square

Inside a square is a circle with radius r. What is the area of the square?

6 years ago

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Sum of the Matrix Elements

Add up all the elements in a NxM matrix where N signifies the number of the rows and M signifies the number of the columns. E...

6 years ago

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Return the Fibonacci Sequence

Write a code which returns the Fibonacci Sequence such that the largest value in the sequence is less than the input integer N. ...

6 years ago