# Matteo Valentinuzzi

Energy engineer

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**Content Feed**

Solved

Must be in the front row...

You are given a matrix followed by a single number. Your object is to write a script that will shift the matrix around so that ...

2 days ago

Solved

Magnet and Iron

(Inspired from <http://www.mathworks.com/matlabcentral/cody/problems/112 Problem 112: Remove the air bubbles>) Iron (atomic n...

2 days ago

Solved

Replace Nonzero Numbers with 1

Given the matrix x, return the matrix y with non zero elements replaced with 1. Example: Input x = [ 1 2 0 0 0 ...

2 days ago

Solved

Matrix multiplication across rows

Given matrix m, return matrix n such that, rows of n are result of multiplication of the rows of the input matrix Example ...

2 days ago

Solved

Convert matrix to 3D array of triangular matrices

Given a 2D numeric array x in which each column represents the vectorized form of an upper triangular matrix, return a 3D array ...

2 days ago

Solved

Too Many Zeros, Dump Them!

Sometimes when I create a matrix, I use this syntax: a = zeros(1000,1000); But when the function ends, I find that I don'...

2 days ago

Solved

Divisible by 6

Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

2 days ago

Solved

Divisible by 5

Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

2 days ago

Solved

Divisible by 4

Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

2 days ago

Solved

Divisible by 3

Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

2 days ago

Solved

Divisible by 2

This is the first problem in a set of "divisible by x" problems. You will be provided a number as a string and the function you ...

2 days ago

Solved

Poker Card Deal!

Anyone want to play a card game? Well this is making one deck of cards, with the option of using 2 jokers. The outputs are ...

19 days ago

Solved

Mongean Shuffle : 2

Extension to <https://www.mathworks.com/matlabcentral/cody/problems/2479-mongean-shuffle problem 2479>: Determine the number...

19 days ago

Solved

Mongean Shuffle

A Mongean shuffle of an n card deck starts with putting the initial deck on the left hand side. * The top card of the deck is...

19 days ago

Solved

Card Game

This is an overly simplified and highly modified version of card game Twenty-Nine. A deck of 100 unique cards (hypothetical) ...

19 days ago

Solved

Gold Standard

Gold has long been used as currency and a standard for currency, due to its inherent value and rarity. Historical data for gold ...

19 days ago

Solved

Pattern Recognition 3 - Variable Unit and Array Length (including cell arrays)

You will be given various arrays, composed of numbers or strings, including cell arrays of strings. For this problem, the patter...

19 days ago

Solved

Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)

You will be given various arrays, composed of numbers or strings, including cell arrays of strings. For this problem, the known ...

19 days ago

Solved

Pattern Recognition 1 - Known Unit Length

You will be given various arrays, composed of numbers or strings. For this problem, the known pattern unit length is three. Writ...

19 days ago

Solved

Self-similarity 3 - Every other pair of terms

Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

19 days ago

Solved

Self-similarity 2 - Every third term

Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

19 days ago

Solved

Self-similarity 1 - Every other term

Self-similar integer sequences are certain sequences that can be reproduced by extracting a portion of the existing sequence. Se...

19 days ago

Solved

Mobius function

From <http://en.wikipedia.org/wiki/Möbius_function wikipedia>: For any positive integer n, define μ(n) as the sum of the prim...

19 days ago

Solved

Not square-free number sequence

<http://oeis.org/A013929 Not square-free numbers> are all positive integers divisible by a square greater than one: 4, 8, 9, 12,...

19 days ago

Solved

Sphenic number sequence

<http://oeis.org/A007304 Sphenic numbers> are positive integers that are products of three distinct prime numbers: 30, 42, 66, 7...

19 days ago

Solved

SatCom #6: Inclination of a Sun-Synchronous Orbit

*Satellite and Space Engineering - Problem #5* _This is part of a series of problems looking at topics in satellite and space...

19 days ago

Solved

Elastic Collision 001: 1-D

Elastic Collision of two particles. <http://en.wikipedia.org/wiki/Elastic_collision wiki Elastic Collision> Solve Conservat...

20 days ago

Solved

Find the jerk

No, it's not the author of this problem... Jerk is the rate of change in acceleration over time of an object. So, if given t...

20 days ago

Solved

Bernoulli's Equation

Bernoulli's equation states that for an incompressible fluid the following summation is constant across the flow: v^2/2 + g*z + ...

20 days ago

Solved

SatCom #5: Determine Elliptical Orbit Parameters

*Satellite and Space Engineering - Problem #5* _This is part of a series of problems looking at topics in satellite and space...

23 days ago