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Rui Zhao


Last seen: 7 dagen ago
186 total contributions since 2020

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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: * ...

14 dagen 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 ...

18 dagen ago

Solved


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

18 dagen ago

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

18 dagen 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 ...

18 dagen ago

Solved


factorial of a number x
Factorial of a number x

18 dagen ago

Solved


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

18 dagen ago

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

18 dagen ago

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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.

18 dagen ago

Solved


Volume and area of a sphere
Input(r) - radius Output([v,s]) - volume and area

18 dagen ago

Solved


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

18 dagen ago

Solved


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....

18 dagen ago

Solved


Calculate a Damped Sinusoid
The equation of a damped sinusoid can be written as |y = A.&#8519;^(-&lambda;t)*cos(2πft)| where |A|, |&lambda;|, and |f| ...

19 dagen ago

Solved


Solve a System of Linear Equations
*Example*: If a system of linear equations in _x&#8321_ and _x&#8322_ is: 2 _x&#8321;_ + _x&#8322;_ = 2 _x&#8321;...

19 dagen 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...

20 dagen 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...

20 dagen 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...

21 dagen ago

Solved


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

22 dagen ago

Solved


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

22 dagen ago

Solved


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...

23 dagen ago

Solved


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

23 dagen 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...

23 dagen 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...

23 dagen 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...

24 dagen ago

Solved


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

24 dagen 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

24 dagen ago

Solved


reverse string
input='rama' output='amar'

24 dagen ago

Solved


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

24 dagen ago

Solved


Multiply by 3
Given the variable x as your input, multiply it by three and put the result in y.

24 dagen ago

Solved


square number
Square a number

24 dagen ago

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