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square number
Square a number

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Cos Function
x is the abscissa. find the absolute value of cosine of -x and the same value with changed sign.

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only input
Return the output without writing any code into the function.

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Create a square matrix of multiples
Given an input, N, output a matrix N x N with each row containing multiples of the first element of each row. This also applies...

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Area of a circle
Find the value for area of the circle if diameter is given

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Get all prime factors
List the prime factors for the input number, in decreasing order. List each factor. If the prime factor occurs twice, list it as...

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Multiples of a Number in a Given Range
Given an integer factor _f_ and a range defined by _xlow_ and _xhigh_ inclusive, return a vector of the multiples of _f_ that fa...

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Area of a disk
Find the area of a disk or circle. x= radius of the disk.

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Area of a Square
Inside a square is a circle with radius r. What is the area of the square?

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Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

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Compare two input matrices
Check which input matrix has more elements. Return "1" if matrix A has more elements than matrix B. Otherwise return "0". Exa...

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Find out sum of all elements of given Matrix
Find out sum of all elements of given Matrix A=[1 2 3;4 5 6 ;7 8 9]; Answer must be: 45 *If you like this problem, pl...

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Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

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Sums with Excluded Digits
Add all the integers from 1 to n in which the digit m does not appear. m will always be a single digit integer from 0 to 9. no...

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Summation of array
Given an array, Find the sum of all of the elements in it Examples: Input x = [1 2 3 5; 4 5 6 7]; Output y is 33

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Solving Quadratic Equations (Version 2)
Before attempting this problem, solve version 1: <https://www.mathworks.com/matlabcentral/cody/problems/2510-solving-quadratic-...

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Solving Quadratic Equations (Version 1)
Quadratic equations have the form: ax^2 + bx + c = 0. Example: x^2 + 3x + 2 = 0, where a = 1, b = 3, and c = 2. The equation has...

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If-then-else
Complete the function below such that if the value of x is in the range 10 to 14, inclusive, the value 18 is assigned to y. Oth...

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Generate a NaN...on purpose
The goal is to create a function that will return a single "NaN" without using the nan function. I am interested to see how many...

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Reverse a matrix
Its simple. You have to reverse a given matrix.

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prime test
find largest 2 digit prime number

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Hydrostatic Pressure
Given depth(height), in m, find the pressure under a body of water. Need to know the density of water(kg/m^3), and gravity(m/s^2...

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Kinetic Energy
Given mass, m, and kinetic energy, KE, find the velocity of the object.

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Joules to Megatons of TnT
Given joules, J, make a function that converts to megatons of TNT.

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MPS to MPH
Given the speed in miles per second, find the speed in miles per hour.

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Radians to Degrees
Convert radians to degrees.

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Energy-Mass Equivalence
Given input enegy of the object, E, and constant c = 300,000,000, find the mass of the object.

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Rankine to Celsius Converter
Given input R, degrees Rankine, convert into degrees Celsius.

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Degrees to Radian
Convert degrees to radians

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pressure to dB?
given x ratio of pressure, find corresponding y dB

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