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Prouhet–Tarry–Escott (basic)
Inspired by <http://www.mathworks.com/matlabcentral/cody/problems/660-find-a-subset-that-divides-the-vector-into-equal-halves pr...

8 years ago

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Logistic map
The sequence defined by x_n = 4*r*x_{n-1}*(1-x_{n-1}) and a given 0 < x_1 < 1 turns x_n for an n > 0 into a polynomial of r. ...

8 years ago

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Big data
Optimize this line of code: B = sum(gradient(corrcoef(A)).^2); for a matrix A with size(A,2)>>size(A,1) *Description:...

8 years ago

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Rotate a Matrix by 90 degrees
Rotate a Matrix by 90 degrees Example: If the input is: X = 1 2 3 4 5 6 7 8 9 ...

8 years ago

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Numerate input arguments
For every string input, output the corresponding number. For example: [a, b] = Test('first', 'second') a=1; b=2;

8 years ago

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Find a subset that divides the vector into equal halves
Given a vector x, return the indices to elements that will sum to exactly half of the sum of all elements. Example: Inpu...

8 years ago

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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...

8 years ago

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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 ...

8 years ago

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Integer sequence - 2 : Kolakoski sequence
Get the n-th term of <https://oeis.org/A000002 Kolakoski Sequence>.

8 years ago

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Golomb's self-describing sequence (based on Euler 341)
The Golomb's self-describing sequence {G(n)} is the only nondecreasing sequence of natural numbers such that n appears exactly G...

8 years ago

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Check to see if a Sudoku Puzzle is Solved
*Description:* Your task, should you choose to accept it, is to make a function that checks to see if a 9x9 matrix of integer...

8 years ago

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Sum of self power series
The series, 1^1,2^2,3^3,4^4,.... Find the sum of such series when x terms are given.

8 years 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.

8 years ago

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Magic!
Check whether the input matrix is a normal magic square: <http://en.wikipedia.org/wiki/Magic_square> Output the logical va...

8 years ago

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03 - Matrix Variables 5
Make the following variable: <<http://samle.dk/STTBDP/Assignment1_3e.png>>

8 years ago

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02 - Vector Variables 3
Make the following variable: <<http://samle.dk/STTBDP/Assignment1_2c.png>> (all the numbers from 5 to -5 in increments of ...

8 years ago

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02 - Vector Variables 5
_eVec_ = _Hello_ ( _eVec_ is a string, which is a vector of characters )

8 years ago

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Is X a Fibonacci Matrix?
In honor of Cleve's new blog and post: <http://blogs.mathworks.com/cleve/2012/06/03/fibonacci-matrices/> Is X a Fibonacci ...

8 years ago

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Integer Sequence - II : New Fibonacci
Crack the following Integer Sequence. (Hints : It has been obtained from original Fibonacci Sequence and all the terms are also ...

8 years ago

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Where's Waldo?
Find the string 'Waldo' in the character matrix given and return the indices of where you found him as a 4x2 matrix whose contai...

8 years ago

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Sum the Infinite Series
Given that 0 < x and x < 2*pi where x is in radians, write a function [c,s] = infinite_series(x); that returns with the...

8 years ago

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number of groups
In a classroom, *n* students work on a special project and the other students work in groups of five. If there are 18 students i...

8 years ago

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Cell Counting: How Many Draws?
You are given a cell array containing information about a number of soccer games. Each cell contains one of the following: * ...

8 years ago

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Check availability of a number in an array
An array is given A=[1 2 3 4 5 7 8 9 10]. Find whether the number n is present in given array or not. If the number n is prese...

8 years ago

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Implement a bubble sort technique and output the number of swaps required
A bubble sort technique compares adjacent items and swaps them if they are in the wrong order. This is done recursively until al...

8 years ago

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Cannon Ball
Given g (acceleration due to gravity) and desired altitude x, find the minimum ground velocity of a cannon ball to reach x.

8 years ago

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Given area find sides
In a right angle triangle given area 'A' one arm=x, another arm=2x then find the value of x. For example, area A=400 then ...

8 years ago

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Tune your guitar
Given an input string with the scientific pitch notation for standard tuning ( <http://en.wikipedia.org/wiki/Guitar_tunings#Stan...

8 years ago

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edge detection
write a function that gives the indexes of rising or falling edge x is a vector (assume it contains always at least one eleme...

8 years ago

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

8 years ago