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**Content Feed**

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Simple Caesar Cypher - shift encrypt a message given an index number

A Caesar cypher is a simple shift encryption method. Your goal is to create a function that allows a user to input a string and ...

12 days 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...

13 days 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. ...

14 days ago

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cross-section of 3D pyramid

Create 3d pyramid of ones and zeros...where pyramid-part is denoted by ones and outer-part is denoted by zeros..where base is sq...

14 days ago

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Top layer of a 3D pyramid

create a 3D pyramid(x,y,z) of ones(1) and zeros(0)...where pyramid part is denoted by one....nd find the top layer(x,y) of the p...

14 days ago

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Height of a 3D Pyramid

If a pyramid is made with one(1). What will be the height of the pyramid of square shaped base(n*n)? where input is n.

14 days ago

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Replace values out of an interval with the lower or upper values

For a vector or matrix X and an interval [n1,n2], the function replace every element of x inferior to n1 by n1, and every elemen...

14 days ago

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Iterative sum of digits of 2^n number

Given n, calculate the number 2^n (where n>=0) and iterate until the sum of the digits is a single-digit number. Example: Inp...

14 days ago

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Maximum of ND-array

Find the maximum element of a N dimensional array. Example: A=[1 2 4 ; -20 4 10]; The maximum is 10.

14 days ago

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Find the sum of all the numbers of the input vector

Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...

3 months ago

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Detect circles in images

Given an image and a target radius range, specified as [rmin rmax], find circles in the image. Your function should output an m-...

4 months ago

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give-nth-decimal-place-of-pi up to 100 digits

max 100th place after the decimal point this is upgrade problem of 142

4 months ago

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Ring Matrix

Given n (only odd), return output matrix a that has concentric rings of the numbers 1 through (n+1)/2 around the center point. ...

4 months ago

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Sum of digits of powers of 2

Given n, first, calculate the number 2^n. Then, sum the digits that comprise that number. For example: Input: n = 7 2^n = ...

4 months ago

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Number of lattice points within a circle

Find the number of points (x,y) in square lattice with x^2 + y^2 =< n. This is related to Jame's <http://www.mathworks.com/matla...

4 months ago

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The almost-birthday problem.

This is a harder version of the birthday problem. Now, you will have to determine the probability that two or more people in a r...

4 months ago

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Schwarzschild radius

Compute the Schwarzschild radius for objects of mass m (kg). Use c = 299,792.458 km/s and G = 6.6738*10^-11 N*(m/kg)^2. Your fun...

4 months ago

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Periodic Table II 101.

Given the symbol of an element, return its atomic number. This is the continuation of <http://www.mathworks.com/matlabcentral/co...

4 months ago

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Special Relativity 101.

Special relativity states that the effective mass of an object varies as a function of its velocity. If *c* is the speed of ligh...

4 months ago

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Number of vertices of a hypercube

Return the number of vertices of a n-dimensional hypercube.

4 months ago