Solved

Cumulative probability of finding an unlikely combination

This is a supplemental problem to the <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition CryptoMath> ...

12 months ago

Solved

Implement Solitaire cipher for N long deck.

Implement the <http://en.wikipedia.org/wiki/Solitaire_(cipher) solitaire cypher>. Given a starting permutation of numbers [1:...

12 months ago

Solved

Cryptomath: Addition

W A I T + A L L --------- G I F T S equals: 9 6 0 8 + 6 7 7 --------- 1 0 2 8 5 Given str...

12 months ago

Solved

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...

12 months ago

Solved

Avalaible area: wall construction

You need to build a wall to enclose a certain area. Calculate the available area after you build the wall. Assumptions * ...

12 months ago

Solved

Does the coin touch the line?

If we throw a coin that has a diameter of d, its center will land in a grid n x m. What is the probability that the coin land...

12 months ago

Solved

Find the Connecting Path

Here is a matrix x x = [7 6 8 5 7 2 4 5 1 3 0 0 0 7 7 7 7 7 0 0 0 0 0 0 0 0 0 0 0 5 5 5 5 5 0 0 0 0 0 0...

12 months ago

Solved

Nth roots of unity

First, find the n nth roots of unity. eg if n = 6, find the n distinct (complex) numbers such that n^6 = 1. <https://en.wiki...

12 months ago

Solved

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.

12 months ago

Solved

How to permute given 3d matrix?

A(:,:,1)=[1 3] A(:,:,2)=[2 2] A(:,:,3)=[4 3] Change rows to columns and columns to rows, similar to transpose. Resul...

12 months ago

Solved

How to calculate log?

There is a log that have base 5. How to calculate? log5(x)?

12 months ago

Solved

Calculate area of sector

A=function(r,seta) r is radius of sector, seta is angle of sector, and A is its area. Area of sector A is defined as 0.5*(r^2...

12 months ago

Solved

Frequency Analysis of Text

Frequency analysis is a common task in cryptoanalysis. It is essentially counting the occurrences of alphabets (regardless of ca...

12 months ago

Solved

Calculate vowel / consonant ratio of a string

Given a string, calculate the ratio of vowels to consonants for example : x = 'This is a very good Day!' y = 7/11

12 months ago

Solved

Find the next prime number

Find the next prime number or numbers for given n. For example: n = 1; out = 2; or n = [5 7]; out = [7 11]; ...

12 months ago

Solved

Find number patterns in rows of a matrix...

So I think this may be a hard one, may be it was only hard for me! So here is what it is, I will give a matrix, with some numbe...

12 months ago

Solved

Find same numbers touching each other...

So the goal here is to find any number that is equal to its immediate neighbors and mark it true. Here is some examples: x...

12 months ago

Solved

The sum of individual numbers...

Well this one is taking a number and then summing the individual parts till you reach a value of 1, 2, 3, 4, 5, 6, 7, 8, 9, or 0...

12 months ago

Solved

Finding the next number in a number list, are you able to crack it!

So it goes like this, I give a number list and you find the next value! I found a way to do it, just wondering how many other...

12 months ago

Solved

Can you beat the lottery?

Well this one you may not get every time, but it is a lottery! Here is the code that generates the lottery numbers (you can try ...

12 months ago

Solved

Ohm's Law

Well its Ohm's law... So V = IR! I will give two of the three values, such as V and I or I and R and you have to return th...

12 months ago

Solved

Fast 1-D Convolution (same shape)

Pursuant to the first problem in the <http://www.mathworks.com/matlabcentral/cody/?term=Fast+1-D+Convolution fast 1-D convolutio...

12 months ago

Solved

Fast 1-D Convolution (valid shape)

Pursuant to the first problem in the <http://www.mathworks.com/matlabcentral/cody/?term=Fast+1-D+Convolution fast 1-D convolutio...

12 months ago

Solved

Cody meets Xiangqi: foresee the unseen (Part 1)

This is the first part of the Xiangqi series. The second part in this series is: <http://www.mathworks.com/matlabcentral/cody/pr...

12 months ago

Solved

String Array Basics, Part 4: Convert String Array with Missing Values to Cell Array

<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

12 months ago

Solved

Generating random matrix with given probability mass function

Inspired by <http://www.mathworks.com/matlabcentral/cody/problems/2356-simulating-the-selection-of-a-state-with-given-probabilit...

12 months ago

Solved

String Array Basics, Part 2: Convert String Array to Cell Array; No Missing Values

<http://www.mathworks.com/help/matlab/characters-and-strings.html String array> and cell array are two types of containers for s...

12 months ago

Solved

Apply Function to Each Field of a Structure Array: Part 2

The builtin <http://www.mathworks.com/help/matlab/ref/structfun.html?=structfun structfun> applies a function handle to each fie...

12 months ago

Solved

Integer complexity (Large numbers)

Inspired by <http://www.mathworks.com/matlabcentral/cody/problems/42831-integer-complexity Problem 42831>, this problem aims to ...

12 months ago

Solved

Text processing - Help Johnny write a letter home from camp

Johnny overuses the word 'great'. Write a script that will help him with this and future letters. If a sentence contains more ...

12 months ago