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Siren frequency and Doppler effect.
The Doppler effect is described on OpenStax University Physics at https://openstax.org/books/university-physics-volume-1/pages/1...

4 years ago

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Functional inputs
Return an n-dimensional array whose elements are the results of a function over a set of vectors. The (i,j,k, ...n)th element...

4 years ago

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Retirement savings
At the start of what year will you have reached or exceeded a savings goal? Parameters (all are constant scalars given in a s...

4 years ago

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Reduce - Map-Reduce
Write reduce function, that takes arguments and constantly folds results into next call argument, finally returning a value; ...

4 years ago

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Distance of the centroids of the balls
Given *n* balls of radius *r* and the vector *p (nx3)* with all position *(x,y,z)* of the balls, return the symmetric matrix *A ...

4 years ago

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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...

4 years ago

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SatCom #4: Satellite Orbit Altitude
Satellite and Space Engineering - Problem #4 This is part of a series of problems looking at topics in satellite and space comm...

4 years ago

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Total resistance of resistors in parallel
What is the total resistance of a number of resistors in parallel? A vector R contains the resistances (in Ohm) of n resistors,...

4 years ago

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Total resistance of resistors in series
What is the total resistance of a number of resistors in series? A vector R contains the resistances (in Ohm) of n resistors, w...

4 years ago

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Free Fall analytical solution (Chapra 2012 textbook Example 1.1)
Analytical solution to bungee jumper problem. Given time series as a vector, parameters mass and drag coefficient, and gravit...

4 years ago

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Output the Montgomery Form of the Input Matrix

4 years ago

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Vogel-Dobbener entropy
*Vogel-Dobbener entropy* is a measure of dispersion for ordinal variables. Given an ordered list of distinct observations u_...

4 years ago

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Modular multiplicative inverse
Modular multiplicative inverse is used for _The Chinese Remainder Theorem_ and _RSA algorithm_. You can visit <http://en.wikiped...

4 years ago

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Cryptography with A Square Matrix : Decoding
Previous Problem: <https://www.mathworks.com/matlabcentral/cody/problems/45279-cryptography-with-a-square-matrix-encoding Crypto...

4 years 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...

4 years 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 Problem 1069. input = 78 outpu...

4 years ago

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Repeat string n times - 3
function myOutput = rep_str_3(string1, string2, num1, num2, n) function desiredOutput = rep_str_3('string1', 'STRING2', 0...

4 years ago

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Repeat string n times - 2
This is the two variable version of <http://www.mathworks.com/matlabcentral/cody/problems/42482-repeat-string-n-times Repeat str...

4 years ago

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Primes Faster for Large N
This Challenge is to improve the "primes" function for speed. This may be accomplished by fixing memory usage. The Matlab fun...

4 years ago

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Find the area of a triangle having vertices (A,B), (C,D), and (E,F)
Find the area of a triangle using if we have the three vertices of the triangle

4 years ago

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Find argmax of a function
You are given vectors x and y (=f(x)). Return the element of x for which f(x) is maximized.

4 years ago

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Return the sequence element II
Given positive integers x and n, return a positive integer, y, which is the nth term in the <https://en.wikipedia.org/wiki/Juggl...

4 years ago

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imaginary results
Return the value of the imaginary number i to the power of input argument n.

4 years ago

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Circumcircle Points
Determine the radius of the minimum sized circle that encompasses all the points. Per <http://www.inf.ethz.ch/personal/gaertn...

4 years ago

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Is 3D point set Co-Planar?
This Challenge is to determine if four 3D integer points are co-planar. Given a 4x3 matrix representing four x,y,z integer poin...

4 years ago

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Text File Read: 64 bit data set
This Challenge is to read a text file that has vary large integers up to 2e18, typical for <http://code.google.com/codejam/conte...

4 years ago

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Easy Sequences 40: Quadratic Congruence
Quadratic Congruence is a modular equation of the form: . In this exercise you will be given a vector containing the coefficie...

4 years ago

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Solitaire Cipher
Implement the <http://en.wikipedia.org/wiki/Solitaire_(cipher) solitaire cipher>. Since this is from Wikipedia, I am capturin...

4 years ago

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GJam 2017 Kickstart: Leader (Small)
This Challenge is derived from <http://code.google.com/codejam/contest/6304486/dashboard#s=p0 GJam 2017 Kickstart Leader>. This ...

4 years ago

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Create array of all Distances between two Sets of Points
This Challenge is a subsection of Martian Pranks based on Tim's efficient Distance calculation between sets of points. Given Po...

4 years ago