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# Viktor Knaus

Last seen: 5 dagen ago Active since 2021

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Balanced number
Given a positive integer find whether it is a balanced number. For a balanced number the sum of first half of digits is equal to...

5 dagen ago

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Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
The given function returns the index of the maximum value in a given matrix. such as X=[4,3,4,5,9,12,0,5] Ans= 6 if maxim...

5 dagen ago

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cross in array
Make a cross from "1" in odd size array. Other value from array should be equal to "0"; As input you get length of side of arra...

6 dagen ago

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angle in regular polygon
Make a function which returns measure of interior angle in x-side regular polygon. x is as input. Please pay attention, that 1 ...

6 dagen ago

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What's size of TV?
Many people buy TV. Usually they ask about diagonal. But also important are width and height. Let's assume that all TV have rati...

6 dagen ago

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Sudoku square
We have a small Sudoku square, but one number is missing. x = [ 1 5 4 8 6 3 0 9 7 ] Make a function, wher...

6 dagen ago

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Next Lower Power of B
Given a number _n_ and a base _B_ greater than 1, return the lowest integer power of _B_ that is less than or equal to _n_. E...

7 dagen ago

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Fahrenheit to Celsius converter
Convert Fahrenheit to Celsius degrees.

8 dagen ago

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Square wave average calculation
Given its peak and duty cycle, calculate avg value of square wave

8 dagen ago

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Weave two vectors into one
Weave the two given vectors into one as shown below. Example: If a = [1 1 1] b = [0 0 0] then y = [1 0 1 0 ...

8 dagen ago

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Is it an Armstrong number?
An Armstrong number of three digits is an integer such that the sum of the cubes of its digits is equal to the number itself. Fo...

8 dagen ago

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Happy 2013...
Happy 2013, everyone! An interesting tidbit about 2013 is that it is the first year since 1987 to contain four different digits...

9 dagen ago

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Fermat's Last Theorem - Fermat's conjecture
Fermat's Last Theorem (sometimes called Fermat's conjecture, especially in older texts) states that no three positive integers a...

9 dagen ago

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Project Euler: Problem 9, Pythagorean numbers
A Pythagorean triplet is a set of three natural numbers, a b c, for which, a^2 + b^2 = c^2 For example, 3^2 + 4^2 =...

10 dagen ago

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Determine if input is a perfect number
A <http://en.wikipedia.org/wiki/Perfect_number/ perfect number> occurs whent the sum of all divisors of a positive integer, exce...

10 dagen ago

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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...

10 dagen ago

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First N Perfect Squares
*Description* Return the first N perfect squares *Example* input = 4; output = [ 1 4 9 16 ];

11 dagen ago

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Matlab Basics II - Create a vector with a repeated entry
Create a row vector of length n, filled with 4's, for example, if n = 3 output = [4 4 4] make sure to round UP when n is a...

11 dagen ago

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Back to basics 9 - Indexed References
Covering some basic topics I haven't seen elsewhere on Cody. Given an input matrix and row and column, output the index of th...

11 dagen ago

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Find the "ordinary" or Euclidean distance between A and Z
A, B and Z define three points in the 3D _Euclidean_ space of the form: A = [x1;y1;0]; B = [x2;y2;0]; Z = [x2;y2;z]; Find th...

12 dagen ago

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Sum of series VII
What is the sum of the following sequence: Σ(km^k)/(k+m)! for k=1...n for different n and m?

13 dagen ago

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Sum of series VI
What is the sum of the following sequence: Σk⋅k! for k=1...n for different n?

14 dagen ago

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Sum of series V
What is the sum of the following sequence: Σk(k+1) for k=1...n for different n?

14 dagen ago

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Sum of series IV
What is the sum of the following sequence: Σ(-1)^(k+1) (2k-1)^2 for k=1...n for different n?

14 dagen ago

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Sum of series III
What is the sum of the following sequence: Σ(2k-1)^3 for k=1...n for different n?

14 dagen ago

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Sum of series II
What is the sum of the following sequence: Σ(2k-1)^2 for k=1...n for different n?

14 dagen ago

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Sum of series I
What is the sum of the following sequence: Σ(2k-1) for k=1...n for different n?

14 dagen ago

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surface of a spherical planet
you just discovered its circumference, that is the input.

15 dagen ago

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Back to basics 6 - Column Vector
Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector, output true or false whether it is a colu...

15 dagen ago

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Mersenne Primes vs. All Primes
A Mersenne prime (M) is a prime number of the form M = 2^p - 1, where p is another prime number. <https://www.mathworks.com/matl...

16 dagen ago