Solved

Compute a dot product of two vectors x and y
x and y are input vectors, d is a number and contains their dot product

11 years ago

Solved

Determine Whether an array is empty
Input a matrix x, output y is TRUE if x is empty, otherwise FALSE.

11 years ago

Solved

Back to basics 7 - Equal NaNs
Covering some basic topics I haven't seen elsewhere on Cody. Given 2 input variables, output true if they are equal, false ot...

11 years ago

Solved

Who knows the last digit of pi?
There is only one man who knows the last digit of pi, who is that man? Give the name of that man, who, by popular believe, can ...

11 years ago

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Number of 1s in a binary string
Find the number of 1s in the given binary string. Example. If the input string is '1100101', the output is 4. If the input stri...

11 years ago

Solved

Stuff the Board
You have a stack of tiles to put onto an array-like playing board. Each tile has a number (always an integer), and the board var...

11 years ago

Solved

Rotate and display numbered tile
Imagine a square tile with four numbers on it, one on each edge. We will call these edges north, east, south, and west. If th...

11 years ago

Solved

Scoring for oriented dominoes
Given a list of ordered pairs, and the order they should be placed in a line, find the sum of the absolute values of the differe...

11 years ago

Solved

Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

11 years ago

Solved

Clock Solitaire
Many card players will be familiar with the game of <http://en.wikipedia.org/wiki/Clock_patience Clock Solitaire>. Briefly, th...

11 years ago

Problem

Clock Solitaire
Many card players will be familiar with the game of <http://en.wikipedia.org/wiki/Clock_patience Clock Solitaire>. Briefly, th...

11 years ago | 2 | 37 solvers

Solved

Project Euler: Problem 10, Sum of Primes
The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17. Find the sum of all the primes below the input, N. Thank you <http:/...

11 years ago

Solved

Get the length of a given vector
Given a vector x, the output y should equal the length of x.

11 years ago

Solved

Project Euler: Problem 6, Natural numbers, squares and sums.
The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ...

11 years ago

Problem

Key Generation for Solitaire Cipher
The Solitaire Cipher by Bruce Schneier was introduced to Cody in two problems by Doug Hull: http://www.mathworks.com/matlabcent...

11 years ago | 0 | 6 solvers

Solved

Key Generation for Solitaire Cipher
The Solitaire Cipher by Bruce Schneier was introduced to Cody in two problems by Doug Hull: http://www.mathworks.com/matlabcent...

11 years ago

Solved

Count from 0 to N^M in base N.
Return an array of numbers which (effectively) count from 0 to N^M-1 in base N. The result should be returned in a matrix, with ...

11 years ago

Solved

Solitaire Cipher
Implement the <http://en.wikipedia.org/wiki/Solitaire_(cipher) solitaire cipher>. Since this is from Wikipedia, I am capturin...

11 years ago

Solved

Lose control
Remove all characters that are below space in ASCII value.

11 years ago

Solved

2 b | ~ 2 b
Given a string input, output true if there are 2 b's in it, false if otherwise Examples: 'Macbeth' -> false 'Publius Cor...

11 years ago

Solved

Rotate a Matrix
Input a Matrix x, Output y is the matrix rotating x 90 degrees clockwise

11 years ago

Solved

How long is the longest prime diagonal?
Stanislaw Ulam once observed that if the counting numbers are <http://en.wikipedia.org/wiki/Ulam_spiral arranged in a spiral>, t...

11 years ago

Solved

How many trades represent all the profit?
Given a list of results from trades made: [1 3 -4 2 -1 2 3] We can add them up to see this series of trades made a profit ...

11 years ago

Solved

Spot the outlier
All points except for one lie on a line. Which one is the outlier? Example: You are given a list of x-y pairs in a column ...

11 years ago

Solved

Create matrix of replicated elements
Given an input element x, and the dimensions, (m, n) return a matrix of size m x n filled with element x. Example: Input: ...

11 years ago

Solved

Multiply 2 numbers
Very easy, you just have to multiply 2 numbers but you cannot use the following signs (*, /, - ,^) ,mtimes , times, cross, pro...

11 years ago

Solved

Replace Vector Elements
Replace all elements in a vector which are equal to or smaller than zero with 0.1. Example: A = [1 2 3 -1 0 2 -3 -80]; ...

11 years ago

Solved

Create a square matrix of multiples
Given an input, N, output a matrix N x N with each row containing multiples of the first element of each row. This also applies...

11 years ago

Solved

Equal to their cube
Tell me three real numbers that are equal to their cubes?

11 years ago

Solved

Who is the smartest MATLAB programmer?
Who is the smartest MATLAB programmer? Examples: Input x = 'Is it Obama?' Output = 'Me!' Input x = 'Who ?' Ou...

11 years ago