# Joshua Sonn

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**Content Feed**

Solved

Calculate the area of a triangle between three points

Calculate the area of a triangle between three points: P1(X1,Y1) P2(X2,Y2) P3(X3,Y3) these three points are the vert...

10 months ago

Solved

Summing digits

Given n, find the sum of the digits that make up 2^n. Example: Input n = 7 Output b = 11 since 2^7 = 128, and 1 + ...

10 months 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 ...

1 year ago

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Sum of series VII

What is the sum of the following sequence: Σ(km^k)/(k+m)! for k=1...n for different n and m?

1 year ago

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Sum of series VI

What is the sum of the following sequence: Σk⋅k! for k=1...n for different n?

1 year ago

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Sum of series V

What is the sum of the following sequence: Σk(k+1) for k=1...n for different n?

1 year ago

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Sum of series IV

What is the sum of the following sequence: Σ(-1)^(k+1) (2k-1)^2 for k=1...n for different n?

1 year ago

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Sum of series III

What is the sum of the following sequence: Σ(2k-1)^3 for k=1...n for different n?

1 year ago

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Sum of series II

What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?

1 year ago

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Sum of series I

What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?

1 year ago

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NO _________ ALLOWED....

So you're given a sentence where if there is a particular word in the sentence then the output is 1, if it is not there then the...

1 year ago

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Split a given string from the first instance of a given character

A simple operation to split a given string into two substrings at the point where the desired character is first found. e.g. ...

1 year ago

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ABBREVIATION

Abbreviate the given string. Consider Only Capital Letters. EXAMPLE If input is 'Abbreviation of The Given String' then ou...

1 year ago

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Mean and standard deviation of times in string

Input(t) - cell of strings with times in format 'min:sec.ms' Output([m, s]) - two strings with mean and standard deviation wi...

1 year ago

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Is the paranthesis sequence balanced ?

Quantum mechanics and computer science are interested in <http://en.wikipedia.org/wiki/Bra%E2%80%93ket_notation bra-kets>. Today...

1 year ago

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Simple Decoder Ring

The stereotypical _decoder ring_ is remembered as a cereal box prize from the 1950s. Kids learned about cryptography by startin...

1 year ago

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Count letters occurence in text, specific to words with a given length.

Build a function with two input arguments: a string and a word length (number of letters), that outputs a vector of counts of th...

1 year ago

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Join Strings with Multiple Different Delimiters

The idea is to form the string S by interleaving the elements of a cell array of strings DELIMITER and another cell array of st...

1 year ago

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Eliminate Polysyllabics: Long live short words!

Given a string s1, return s2 in which all the words with more than one syllable have been removed. To make things simple, we ...

1 year ago

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Plot Damped Sinusoid

Given two vectors |t| and |y|, make a plot containing a blue ( |b| ) dashed ( |--| ) line of |y| versus |t|. Mark the minimum...

1 year ago

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Make a list string

Given a cell string, produce a string separating the items with spaces and commas and with an 'and' preceding the final item, an...

1 year ago

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How many digits are there?

Input(s) - any string Output(n) - number of digits within string s

1 year ago

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Convert Two Character String into a Binary Vector

Given a string "XOXXO" convert it into a binary vector. [1 0 1 1 0] Paul Berglund implemented an optimal method in <http://ww...

1 year ago

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The 5th Root

Write a function to find the 5th root of a number. It sounds easy, but the typical functions are not allowed (see the test su...

1 year ago

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Ned's queens

A tribute to Cody's five-year anniversary should also celebrate the people behind Cody, and in this particular case, our illustr...

1 year ago

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Parse me a Lisp

*Description* In Lisp and its variants, function calls are done using parenthesis where the first item in the parenthesis is ...

1 year ago

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Pi Digit Probability

Assume that the next digit of pi constant is determined by the historical digit distribution. What is the probability of next di...

1 year ago

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Find the nearest prime number

Happy 5th birthday, Cody! Since 5 is a prime number, let's have some fun looking for other prime numbers. Given a positive in...

1 year ago

Solved

Calculate BMI

Given a matrix |hw| (height and weight) with two columns, calculate BMI using these formulas: * 1 kilogram = 2.2 pounds * 1 ...

1 year ago

Solved

Crop an Image

A grayscale image is represented as a matrix in MATLAB. Each matrix element represents a pixel in the image. An element value re...

1 year ago