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**Content Feed**

Solved

Add more zeros

Find code that adds one 0 to each sequence of 0 in a string (composed with only 0 or 1). For example: '1010' -> '100100' ...

7 months ago

Solved

Ordinal numbers

Given an integer n, return the corresponding ordinal number as a character string. For example, ord(1)='1st' ord(2)=...

7 months ago

Solved

Split a string into chunks of specified length

Given a string and a vector of integers, break the string into chunks whose lengths are given by the elements of the vector. Ex...

7 months ago

Solved

Decimal Comparison

*Background* A utility of particular interest to Cody and other MATLAB ventures is comparing the equality of two numbers. In ...

7 months ago

Solved

Guess Cipher

Guess the formula to transform strings as follows: 'Hello World!' --> 'Ifmmp Xpsme!' 'Can I help you?' --> 'Dbo J ifm...

7 months ago

Solved

Reverse within string

If input is a string 'yellow' the output should be 'leywol'. Locate the middle of the string and reverse the first (yel) and sec...

8 months ago

Solved

Find the longest match inside two strings

Given two strings, find the longest string which is contained within both strings. e.g. the longest string that is contained ...

8 months ago

Solved

Project Euler: Problem 11, Largest product in a grid

What is the greatest product of _k_ adjacent numbers in the same direction (up, down, left, right, or diagonally) in a _n×n_ gri...

8 months ago

Solved

Numbers spiral diagonals (Part 2)

Inspired by Project Euler n°28 and 58. A n x n spiral matrix is obtained by starting with the number 1 and moving to the righ...

8 months ago

Solved

Numbers spiral diagonals (Part 1)

Inspired by Project Euler n°28 et 58. A n x n spiral matrix is obtained by starting with the number 1 and moving to the right...

8 months ago

Solved

Recurring Cycle Length (Inspired by Project Euler Problem 26)

Preface: This problem is inspired by <http://projecteuler.net/problem=26 Project Euler Problem 26> and uses text from that quest...

8 months ago

Solved

Sum of big primes without primes

Inspired by Project Euler n°10 (I am quite obviously a fan). With problem n°250 by Doug, you can find some global methods to ...

8 months ago

Solved

Divisors for big integer

Inspired by Problem 1025 and Project Euler 12. Given n, return the number y of integers that divide N. For example, with ...

11 months ago

Solved

Highly divisible triangular number (inspired by Project Euler 12)

Triangular numbers can be calculated by the sum from 1 to n. For example, the first 10 triangular numbers are: 1, 3, 6, 10, ...

11 months ago

Solved

Project Euler: Problem 18, Maximum path sum I

By starting at the top of the triangle below and moving to adjacent numbers on the row below, the maximum total from top to bott...

11 months ago

Solved

Project Euler: Problem 16, Sums of Digits of Powers of Two

2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26. What is the sum of the digits of the number 2^N? Thanks ...

11 months ago

Solved

Longest Collatz Sequence

Inspired by Projet Euler n°14. The Collatz iterative sequence (See Cody problem n° 2103 and 211) is defined for the set of po...

11 months ago

Solved

Large Sum (inspired by Project Euler 13)

Your function will be provided an arbitrary number of numbers of arbitrary sizes as a cell array of strings. Some numbers will b...

11 months ago

Solved

Sums of cubes and squares of sums

Given the positive integers 1:n, can you: 1. Compute twice the sum of the cubes of those numbers. 2. Subtract the square...

11 months ago

Solved

Twist 'n' Match

Given n and m, construct an n-by-n matrix a such that a, when rotated 90 degrees and compared with itself, matches itself in exa...

1 year ago

Solved

Matrix spiral

Make a spiral in a (n*n) matrix. The spiral has to start in the top left, and has to rotate clockwise to the center. The spiral ...

1 year ago

Solved

Make a logical diamond using GALLERY function

Inspired from <http://www.mathworks.com/matlabcentral/cody/problems/1078-make-a-diamond Problem 1078. Make a diamond> In thi...

1 year ago

Solved

Better bullseye matrix

<http://www.mathworks.com/matlabcentral/cody/problems/18-bullseye-matrix Problem 18> asks to create a bullseye matrix like this:...

1 year ago

Solved

Create a patchwork matrix

This function will assemble a large matrix out of a number of smaller ones m1, m2, etc., according to a pattern P. If P is 3x5,...

1 year ago

Solved

Spiral In

Create an m by n matrix filled with sequential integers starting from 1 and arranged in a counterclockwise spiral that hugs the ...

1 year ago

Solved

Create a matrix X, where each column is a shifted copy of the vector v

Example : in->v = (1:5)'; 1 2 3 4 5 out-> [1 5 4 3 2;2 1 5 4 3;3 2 1 5 4;4 3 2 1 5;5 4 3 ...

1 year ago

Solved

Special matrix

Make a square matrix with this shape. For n=4 M = 1 1 0 0 1 0 1 0 0 1 0 ...

1 year ago

Solved

Make a Star Pyramid

Create a star pyramid. First line will have 1 star, second will have two stars and so on... a basic program which is easily done...

1 year ago

Solved

Create Volcano (or Atoll) martix. It is an extension of Bullseye matrix problem.

For example, if n=2 (maximum value), the output matrix should be [1 1 1 1 1; 1 2 2 2 1; 1 2 1 2 1; 1 2 2 2 1; 1...

1 year ago

Solved

TRON challenge

Create a solver for the classic arcade TRON game <<http://www.alfnie.com/software/figtron.png>> *Description* Your func...

1 year ago