# Rui Zhao

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**Content Feed**

Solved

Convert a Cell Array into an Array

Given a square cell array: x = {'01', '56'; '234', '789'}; return a single character array: y = '0123456789'

11 months ago

Solved

Cell Counting: How Many Draws?

You are given a cell array containing information about a number of soccer games. Each cell contains one of the following: * ...

11 months ago

Solved

Is My Wife Wrong?

Answer the question. (see also <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right Problem 149: Is my ...

11 months ago

Solved

Area of a Square

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

11 months ago

Solved

Insert zeros into vector

Insert zeros after each elements in the vector. Number of zeros is specified as the input parameter. For example: x = [1 ...

11 months ago

Solved

Find the sum of n squares

What is the sum of the squares of the first n integers?

11 months ago

Solved

Speed of car

Calculate the Speed of car given its Distance travelled and time taken in x and y respectively

11 months ago

Solved

Find out value of sine given by degree.

Find out value of sine given by degree. If theta=30, it's value must be 0.5.

11 months ago

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Add two numbers

Calculate the sum of two numbers. Example input = [2 3] output = 5

11 months ago

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Remove element(s) from cell array

You can easily remove an element (or a column in any dimension) from a normal matrix, but assigning that value (or range) empty....

11 months ago

Solved

Calculate a Damped Sinusoid

The equation of a damped sinusoid can be written as |y = A.ⅇ^(-λt)*cos(2πft)| where |A|, |λ|, and |f| ...

11 months ago

Solved

Solve a System of Linear Equations

*Example*: If a system of linear equations in _x₁_ and _x₂_ is: 2 _x₁_ + _x₂_ = 2 _x₁...

11 months ago

Solved

Cell joiner

You are given a cell array of strings and a string delimiter. You need to produce one string which is composed of each string fr...

12 months ago

Solved

Right Triangle Side Lengths (Inspired by Project Euler Problem 39)

If _p_ is the perimeter of a right angle triangle with integral length sides, { _a_, _b_, _c_ }, there are exactly three solutio...

12 months ago

Solved

Is the Point in a Triangle?

Check whether a point or multiple points is/are in a triangle with three corners Points = [x, y]; Triangle = [x1, y1; x...

12 months ago

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Divide by 4

Given the variable x as your input, divide it by 4 and put the result in y.

12 months ago

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Times 3 problem

When you enter the number, it should return the number multiplied by 3

12 months ago

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Sort a list of complex numbers based on far they are from the origin.

Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...

12 months ago

Solved

Square the input

Given a scalar or vector x, return the square of each element. Example x = [7 2] answer = [49 4]

12 months ago

Solved

Duplicate each element of a vector.

for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Ex...

12 months ago

Solved

De-primed

Write a function that will multiply every prime number in the array or matrix by two, leaving all other numbers the same, and re...

12 months ago

Solved

Bullseye Matrix

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

12 months ago

Solved

Remove and Sort

Given a randomized array n, sort it and remove all odd integers. n=5 y = [2 4]

12 months ago

Solved

Sum of odd numbers in a matrix

Find the sum of all the odd numbers in a matrix. Example x = [2 3 5 7 1 4 11] y = 27

12 months ago

Solved

Volume of a box

Given a box with a length a, width b, and height c. Solve the volume of the box.

12 months ago

Solved

Multiply by 3

Given the variable x as your input, multiply it by three and put the result in y.

12 months ago