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Ezz El-din Abdullah


51 total contributions since 2016

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Solved


How to subtract?
*&plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn &plusmn* * Imagine you need to subtract one...

9 Monate ago

Solved


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...

9 Monate ago

Solved


Extra safe primes
Did you know that the number 5 is the first safe prime? A safe prime is a prime number that can be expressed as 2p+1, where p is...

9 Monate ago

Solved


Pernicious Anniversary Problem
Since Cody is 5 years old, it's pernicious. A <http://rosettacode.org/wiki/Pernicious_numbers Pernicious number> is an integer w...

11 Monate ago

Solved


Energy of a photon
*&#9883 &#9762 &#9883 &#9762 &#9883 &#9762 &#9883* Given the frequency F of a photon in giga hertz. Find energy E of this...

11 Monate ago

Solved


Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

11 Monate ago

Solved


Add two numbers
Given a and b, return the sum a+b in c.

11 Monate ago

Solved


Triangle sequence
A sequence of triangles is constructed in the following way: 1) the first triangle is Pythagoras' 3-4-5 triangle 2) the s...

11 Monate ago

Solved


Find a Pythagorean triple
Given four different positive numbers, a, b, c and d, provided in increasing order: a < b < c < d, find if any three of them com...

11 Monate ago

Solved


Side of a rhombus
If a rhombus has diagonals of length x and x+1, then what is the length of its side, y? <<http://upload.wikimedia.org/wikipe...

11 Monate ago

Solved


Is this triangle right-angled?
Given any three positive numbers a, b, c, return true if the triangle with sides a, b and c is right-angled. Otherwise, return f...

11 Monate ago

Solved


Dimensions of a rectangle
The longer side of a rectangle is three times the length of the shorter side. If the length of the diagonal is x, find the width...

11 Monate ago

Solved


Side of an equilateral triangle
If an equilateral triangle has area A, then what is the length of each of its sides, x? <<http://upload.wikimedia.org/wikipe...

11 Monate ago

Solved


Find the dimensions of a matrix
Just find the number of columns of the given matrix. Example x = [1 2 3 4 5 6] y = 2

11 Monate ago

Solved


Area of an Isoceles Triangle
An isosceles triangle has equal sides of length x and a base of length y. Find the area, A, of the triangle. <<http://upload...

11 Monate ago

Solved


Area of an equilateral triangle
Calculate the area of an equilateral triangle of side x. <<http://upload.wikimedia.org/wikipedia/commons/e/e0/Equilateral-tr...

11 Monate ago

Solved


Length of a short side
Calculate the length of the short side, a, of a right-angled triangle with hypotenuse of length c, and other short side of lengt...

11 Monate ago

Solved


Length of the hypotenuse
Given short sides of lengths a and b, calculate the length c of the hypotenuse of the right-angled triangle. <<http://upload....

11 Monate ago

Solved


Is this triangle right-angled?
Given three positive numbers a, b, c, where c is the largest number, return *true* if the triangle with sides a, b and c is righ...

11 Monate ago

Answered
How can I take values directly from MATLAB over serial communication?
I found the answer <https://arduino.stackexchange.com/questions/34752/sending-values-from-matlab-to-arduino-using-serial-communi...

11 Monate ago | 0

| accepted

Question


How can I take values directly from MATLAB over serial communication?
I'm implementing the code in this <https://www.mathworks.com/matlabcentral/fileexchange/64709-matlab-and-arduino-serial-communic...

11 Monate ago | 1 answer | 0

1

answer

Answered
How can I make sure that all rows of a matrix are unique?
Sorry, I didn't notice it's answered before. I found this helpful: https://www.mathworks.com/matlabcentral/answers/299722-re...

11 Monate ago | 0

| accepted

Question


How can I make sure that all rows of a matrix are unique?
I have *X* which is a matrix that I want to delete all rows that are similar to make sure that all rows are unique. Is there ...

11 Monate ago | 1 answer | 0

1

answer

Question


How can I create a random vector with at most 1 in it?
I tried to make a random vector of 0's and 1's like the code below: v = round(rand(1,n)) % where n is the dimension of the ...

11 Monate ago | 1 answer | 0

1

answer

Question


How can I test PCR model?
I'm new to modeling principle component regression. I used MATLAB documentation to see an example on how to do it using the buil...

11 Monate ago | 0 answers | 0

0

answers

Solved


Triangle Numbers
Triangle numbers are the sums of successive integers. So 6 is a triangle number because 6 = 1 + 2 + 3 which can be displa...

mehr als ein Jahr ago

Solved


Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Examp...

mehr als ein Jahr ago

Solved


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 ...

mehr als ein Jahr ago

Solved


Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...

mehr als ein Jahr ago

Solved


Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

mehr als ein Jahr ago

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