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Rayan Khan


Last seen: 4 months ago |  Active since 2021

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Determine if input is a Narcissistic number
<http://en.wikipedia.org/wiki/Narcissistic_number Narcissistic number> is a number that is the sum of its own digits each raised...

4 months ago

Solved


LCM

4 months ago

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Pell numbers
Find the nth pell number <https://en.wikipedia.org/wiki/Pell_number>

4 months ago

Solved


GCD

4 months ago

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Given a vector x, return vector y with all negative elements from the vector x.
Given a vector x, return vector y with all negative elements from the vector x if x has negative elements. Otherwise return 0. ...

5 months ago

Solved


easy problem
Find the last element of the array

5 months ago

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Palindrome numbers
Find the palindrome numbers (two or more digits) from 1 to n where n is the number passed to the function.

6 months ago

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Diagonal Prod

6 months ago

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Rotate a Matrix by 90 degrees
Rotate a Matrix by 90 degrees Example: If the input is: X = 1 2 3 4 5 6 7 8 9 ...

6 months ago

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Crop an Image
A grayscale image is represented as a matrix in MATLAB. Each matrix element represents a pixel in the image. An element value re...

6 months ago

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Tell me the slope
Tell me the slope, given a vector with horizontal run first and vertical rise next. Example input: x = [10 2];

6 months ago

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Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

6 months ago

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Sorted highest to lowest?
Return 1 if the input is sorted from highest to lowest, 0 if not. Example: 1:7 -> 0 [7 5 2] -> 1

6 months ago

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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...

6 months ago

Solved


Is my wife right? Now with even more wrong husband
Again, as in "Is my wife right?" ( <http://www.mathworks.com/matlabcentral/cody/problems/149-is-my-wife-right> ), answer 'yes' r...

6 months ago

Solved


Find the largest value in the 3D matrix
Given a 3D matrix A, find the largest value. Example >> A = 1:9; >> A = reshape(A,[3 1 3]); >> islargest(A) a...

6 months ago

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Too mean-spirited
Find the mean of each consecutive pair of numbers in the input row vector. For example, x=[1 2 3] ----> y = [1.5 2.5] x=[1...

6 months ago

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Project Euler: Problem 1, Multiples of 3 and 5
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23...

6 months ago

Solved


Elapsed Time
Given two date strings d1 and d2 of the form yyyy/mm/dd HH:MM:SS (assume hours HH is in 24 hour mode), determine how much time, ...

6 months ago

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Free passes for everyone!
_Simply return the name of the coolest numerical computation software ever_ *Extra reward* (get a _freepass_): Once a mont...

6 months ago

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CARDS PROBLEM
Read my mind and tell me the card number that I have now in my hands.

6 months ago

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Isothermal Expansion
Given the initial pressure and volume of an ideal gas, calculate the new volume, given the new pressure. Hint: <https://en.wi...

6 months ago

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persistant sum
There will be 9 tests for this problem. In each test you will be provided with 2 integers n=[n1,n2], where n2 is equal to t...

6 months ago

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Test if a matrix is symmetric
Write a logical function that returns 1 if the input matrix is symmetric and 0 otherwise.

6 months ago

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Values in Array
How many values are in the array

6 months ago

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Logarithmically spaced vector creation using linspace
Create a vector y containing n logarithmically spaced values between a and b, with a < b. Avoid using logspace and use the linsp...

6 months ago

Solved


Cube root of max value in a vector
Find the cube root of the maximum value in a vector

6 months ago

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De-dupe
Remove all the redundant elements in a vector, but keep the first occurrence of each value in its original location. So if a =...

6 months ago

Solved


Write a function to generate AND operation

6 months ago

Solved


Bottles of beer
Given an input number representing the number of bottles of beer on the wall, output how many are left if you take one down and ...

6 months ago

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