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List the near-square primes, p = n² + 1 (Landau's 4th problem)
Historical context At the 1912 International Congress of Mathematicians, Edmund Landau listed four basic problems about prime...

4 days ago

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List primes which are the sum of two consecutive lower primes plus minus one
Problem statement Some prime numbers can be written as the sum of two consecutive lower primes plus / minus one : Like t...

4 days ago

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Is A the inverse of B?
Given a matrix A and a matrix B, is A the inverse of B? >>A=[2,4;3,5]; >>B=[-2.5,2;1.5,-1]; >>isInverse...

5 days ago

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Rotate Matrix @180 degree
Rotate Matrix @180 degree Example A=[8 1 6; 3 5 7; 4 9 2], then answer would be [2 9 4;...

5 days ago

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Converts numbers into characters
Converts numbers into characters

5 days ago

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Find the max element of the array
Find the max element of the array

5 days ago

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Square root
Given x (a matrix), give back another matrix, where all the elements are the square roots of x's elements.

5 days ago

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Calculate the average value of the elements in the array
Calculate the average value of the elements in the array

5 days ago

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to the 2 all elements
to the 2 all elements

5 days ago

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the average value of the elements
Calculate the average value of the elements in the array

5 days ago

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Double all elements in the array
Duplicate all elements in the array

5 days ago

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Draw a '0' in a one matrix!

5 days ago

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Mersenne Primes vs. All Primes
A Mersenne prime (M) is a prime number of the form M = 2^p - 1, where p is another prime number. <https://www.mathworks.com/matl...

5 days ago

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Approximation of Pi (vector inputs)
Pi (divided by 4) can be approximated by the following infinite series: pi/4 = 1 - 1/3 + 1/5 - 1/7 + ... For a given numbe...

5 days ago

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geometric progression
I've modified my <http://uk.mathworks.com/matlabcentral/cody/problems/2800-arithmetic-progression previous program> so that it n...

5 days ago

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arithmetic progression
I've written a program to generate the first few terms of <https://en.wikipedia.org/wiki/Arithmetic_progression arithmetic progr...

5 days ago

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Find similar sequences
Another problem inspired by a question on the <http://www.mathworks.com/matlabcentral/answers answers> forum. Given a matrix ...

5 days ago

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Generate Square Wave
Generate a square wave of desired length, number of complete cycles and duty cycle. Here, duty cycle is defined as the fraction ...

5 days ago

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Largest Geometric Series
Extension of Ned Gulley's wonderful Problem 317. In a geometric series, ratio of adjacent elements is always a constant value. ...

5 days ago

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calculate the length of matrix
input 1 array, calculate the length

6 days ago

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SatCom #2: Gain of a circular 'dish' antenna
Satellite and Space Engineering - Problem #2 This is part of a series of problems looking at topics in satellite and space comm...

6 days ago

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SatCom #1: Wavelength of an electomagnetic wave
*Satellite and Space Engineering - Problem #1* _This is the first of a series of problems looking at topics in satellite and ...

6 days ago

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SatCom #7: Thermal Noise in a Receiver
Satellite and Space Engineering - Problem #7 This is part of a series of problems looking at topics in satellite and space comm...

6 days ago

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Energy Conversion 1

6 days ago

Solved

Area Conversion 2

6 days ago

Solved

Area Conversion 1

6 days ago

Solved

Mass Conversion 2

6 days ago

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Temperature Conversion 3
Given a temperature in Celcius, convert it to Fahrenheit.

6 days ago

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Temperature Conversion 2

6 days ago

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Starburst Mandala
Create a mandala starburst using diagonal and orthogonal symmetry in a matrix.

6 days ago