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matrix of natural number

Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 resides seially as shown in the examples below. ...

environ 9 ans ago

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Return 'on' or 'off'

When the input is true, return 'on', otherwise, return 'off'.

environ 9 ans ago

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Calculate Alcohol By Volume with Original and Final Gravity

Given an initial gravity of un-fermented wort (OG) and a final gravity of fermented wort (FG), better known as beer, it is possi...

environ 9 ans ago

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Sum the Digits of a Number

Given an integer, sum the digits repeatedly until you end up with a single value less than 10. For example, if you add the di...

environ 9 ans ago

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Happy 2013...

Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

environ 9 ans ago

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Sum the elements in either diagonal of a square matrix

Sum the elements of a square matrix that lie on either the major diagonal or anti-diagonal.

environ 9 ans ago

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Volume difference between Ellipsoid and Sphere

Given an ellipsoid of semi principal axis (a,b,c) find the volume of the difference between this ellipsoid and the sphere with...

environ 9 ans ago

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Create array of all Distances between two Sets of Points

This Challenge is a subsection of <http://www.mathworks.com/matlabcentral/cody/problems/1110-usc-fall-2012-acm-martian-pranks Ma...

environ 9 ans ago

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compare strings

Given 2 strings and 3 actions (Insert,delete,replace) on characters. Find the difference between two strings. Example: str...

environ 9 ans ago

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Simple return on investment

Assume you have some money and want to invest all your money to stock market. You randomly select a stock and invest all your mo...

environ 9 ans ago

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Reverse the elements of an array

Reverse the order of elements in an array: eg: input X = [ 1 2 3 ; 4 5 6 ; 7 8 9 ] o...

environ 9 ans ago

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Decrypt a secret message!

The crypto system in question is based on phone keyboard. We need two numbers in order to decrypt a word. First number represent...

environ 9 ans ago

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Compute next 1000-day birthday milestone

Given a birthdate in DD-MMM-YYYY format, compute the next 1000-day birthday milestone. For example, Abraham Lincoln was born on ...

environ 9 ans ago

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String permutations on phone keyboard

Given a number such as 2639 return all possible string permutations using the phone-keyboard on <http://www.mathworks.com/matlab...

environ 9 ans ago

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Find out missing number from a vector of 9 elements

You are given a vector of size 9, x = [x1 x2 x3 x4 x5 x6 x7 x8 x9] Elements of x may be randomly selected without repeati...

environ 9 ans ago

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Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

If _p_ is the perimeter of a right angle triangle with integral length sides, { _a_, _b_, _c_ }, there are exactly three solutio...

environ 9 ans 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,...

environ 9 ans ago

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Calculate the height of an object dropped from the sky

Assume that an object is dropped from 1000 meters above the surface of the earth at time t=0. The object is dropped such that t...

environ 9 ans ago

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Square Digits Number Chain Terminal Value (Inspired by Project Euler Problem 92)

Given a number _n_, return the terminal value of the number chain formed by summing the square of the digits. According to the P...

environ 9 ans ago

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Make a diamond

Given n, odd number > 1, return n by n matrix consist of "null" and "*" characters arranged like a diamond. No toolbox funct...

environ 9 ans ago

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Three grind is shipsstraigt

A function that returns either 'Rock', 'Scissors', or 'Paper' (string). You may succeed or you may fail the (case insensitive) t...

environ 9 ans ago

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Poker Series 07: IsTwoPair

The Poker Series consists of many short, well defined functions that when combined will lead to complex behavior. Our goal is t...

environ 9 ans ago

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Gauss Eliminate 2-by-2 example

Use forward elimination to make the coefficient matrix, A, an upper triangular matrix, and then solve using back substitution, f...

environ 9 ans ago

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REPMAT Enhancement - Faster for Large Row Replication of Vector

The Challenge is to modify repmat.m to maintain all of its normal functionality and enhance its performance for large row replic...

environ 9 ans ago

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Operate on matrices of unequal, yet similar, size

You may want to add a vector to a matrix, implying that the vector is added to each column of the matrix. Or multiply a 3x4x5 ma...

environ 9 ans ago

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Find: Faster Alternatives for Large Sorted/Unique Vectors

The Challenge is to create faster Find methods for large unique ascending vectors. Methods exist that are 1000 times faster t...

environ 9 ans ago

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sum of non-primes

The sum of the non-primes below 10 is 1+4+6+8+9+10=38 Find the sum of all the non-primes below the input, N.

environ 9 ans ago

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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...

environ 9 ans ago

Problem

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...

environ 9 ans ago | 4 | 77 solvers