# Matteo Valentinuzzi

Energy engineer

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**Content Feed**

Solved

Combined Ages 2 - Symmetric, n ≥ 3

Following on <http://www.mathworks.com/matlabcentral/cody/problems/42382-combined-ages-1-symmetric-n-3 Combined Ages 2>, you wil...

circa un mese ago

Solved

Combined Ages 1 - Symmetric, n = 3

You have probably seen the common riddle wherein combined ages are provided and you must determine the individual ages. For exam...

circa un mese ago

Solved

Solve the set of simultaneous linear equations

Given this pair of simultaneous linear equations: 2x + 3y = 23 3x + 4y = 32 Find the solution set (x,y)

circa un mese ago

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Linear system of equations

Solve the system of equations in three variables.

circa un mese ago

Solved

System of equations

Find a solution to a system of equations represented by a |n| by |n+1| matrix. For instance, [ 2 0 4; => 2*x = 4 ...

circa un mese ago

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Column norms of a matrix

Given a matrix M, return a vector y such that for each k y(k)=norm(M(:,k)) (y(k) is the Euclidean norm of the k-th col...

circa un mese ago

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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 ...

circa un mese ago

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Magnet and Iron

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

circa un mese ago

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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 ...

circa un mese ago

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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 ...

circa un mese ago

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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 ...

circa un mese ago

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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'...

circa un mese ago

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Divisible by 6

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

circa un mese ago

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Divisible by 5

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

circa un mese ago

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Divisible by 4

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

circa un mese 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...

circa un mese 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 ...

circa un mese ago

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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 ...

circa 2 mesi ago

Solved

Mongean Shuffle : 2

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

circa 2 mesi ago

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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...

circa 2 mesi ago

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Card Game

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

circa 2 mesi ago

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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 ...

circa 2 mesi 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...

circa 2 mesi 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 ...

circa 2 mesi 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...

circa 2 mesi ago

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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...

circa 2 mesi ago

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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...

circa 2 mesi 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...

circa 2 mesi 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...

circa 2 mesi ago

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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,...

circa 2 mesi ago