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GEORGIOS BEKAS


428 total contributions since 2017

Engineering Optimization specialist

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Question


Reshaping an 1x365 matrix with daily observations within a year
I have a matrix with observations and its size is 1x365. It has to do with daily observations starting from the day Sunday, whic...

4 maanden ago | 1 answer | 0

1

answer

Solved


Divisible by 9
Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

6 maanden ago

Solved


Divisible by 3
Pursuant to the <http://www.mathworks.com/matlabcentral/cody/problems/42404-divisible-by-2 first problem> in this series, this o...

6 maanden ago

Question


Can you find the error in this code that aims to sum the digits of a string?
I wrote this code in order to sum the digits of any string, and to also create a loop that stops the summing process when the le...

6 maanden ago | 2 answers | 0

2

answers

Solved


Determine the length of a string of characters
Determine the length of a string of characters

6 maanden ago

Solved


Accessing elements on the diagonal
Access the diagonal elements of a matrix without 'diag' function

6 maanden ago

Solved


Sum the 'edge' values of a matrix
Sum the 'edge' values of an input matrix (the values along the perimeter). Example [1 2 3 4 5 6 7 8 9] Output = ...

6 maanden ago

Solved


MATCH THE STRINGS (2 CHAR) very easy
Match the given string based on first two characters on each string. For example A='harsa'; b='harish'; result '1' ...

6 maanden ago

Solved


Kaprekar Steps
6174 is the <http://en.wikipedia.org/wiki/6174_%28number%29 Kaprekar constant>. All natural numbers less than 10,000 (except som...

6 maanden ago

Solved


Duplicates
Write a function that accepts a cell array of strings and returns another cell array of strings *with only the duplicates* retai...

7 maanden ago

Question


Reading a dat file; there is a bug
I have written the following code in order for MATLAB to read a dat file that I attach. There is a bug in line 20, despite the ...

7 maanden ago | 1 answer | 0

1

answer

Question


Logic behind triple loops
Hi I am new in triple loops and trying to find a way to automate the generation of these numbers: 11000 11001 21001 ...

11 maanden ago | 0 answers | 0

0

answers

Question


BAYESIAN OPTIMIZATION OF A NEURAL NETWORK
I wrote the following code to optimize the architecture of a neural network via Bayesian optimization. What's wrong with it? ...

11 maanden ago | 0 answers | 0

0

answers

Question


Error in creating a function
What's wrong in the following expression? ObjectiveFunction = @x() sim(net, x')

12 maanden ago | 1 answer | 0

1

answer

Question


USING A NEURAL NETWORK AS AN OBJECTIVE FUNCTION INSIDE A GENETIC ALGORITHM
I trained a neural network with the name 'net', after that I am using a genetic algorithm to do some optimization. After using ...

12 maanden ago | 0 answers | 0

0

answers

Solved


Area of a circle
Find the value for area of the circle if diameter is given

ongeveer een jaar ago

Solved


find the surface area of a cube
given cube side length x, find the surface area of the cube, set it equal to y

ongeveer een jaar ago

Solved


Matlab Basics - Create a row vector
Write a Matlab script to create a row vector of 10 consecutive numbers x = [1 2 3 4 5 6 7 8 9 10]

ongeveer een jaar ago

Solved


Create a square matrix of multiples
Given an input, N, output a matrix N x N with each row containing multiples of the first element of each row. This also applies...

ongeveer een jaar ago

Solved


CONVERT TAN TO SIN
In a right angle triangle ABC given the tan(A) then find sin(A) For example tan(A)=3/4 then sin(A)=3/5

ongeveer een jaar ago

Solved


Hard limit function
Classify x data as if x>=0 then y=1 if x<0 then y=0 Example x = [ -2 -1 0 1 2] y = [ 0 0 1 1 1]

ongeveer een jaar ago

Solved


Replace multiples of 5 with NaN
It is required to replace all values in a vector that are multiples of 5 with NaN. Example: input: x = [1 2 5 12 10 7] ...

ongeveer een jaar ago

Solved


Zero Cross
Write a function that counts the number of times n a signal x changes sign. Examples x = [1 2 -3 -4 5 6 -7 8 -9 10 11] ...

ongeveer een jaar ago

Solved


Output any real number that is neither positive nor negative
Output any real number that is neither positive nor negative

ongeveer een jaar ago

Solved


What's Your BMI?
Find the body mass index. For reference, please refer to Wikipedia here: <http://en.wikipedia.org/wiki/Body_mass_index body ...

ongeveer een jaar ago

Solved


07 - Common functions and indexing 2
Define _eMat_: <<http://samle.dk/STTBDP/Assignment1_3e.png>> Calculate eMean as the mean across the rows of _eMat_. The an...

ongeveer een jaar ago

Solved


Back to basics 11 - Max Integer
Covering some basic topics I haven't seen elsewhere on Cody. Return the largest positive integer MATLAB can handle.

ongeveer een jaar ago

Solved


06 - Matrix Equations 1
Define the vectors _aVec_ and _bVec_ and the matrix _aMat_: <<http://samle.dk/STTBDP/Assignment1_2a.png>> and <<http:/...

ongeveer een jaar ago

Solved


given 3 sides, find area of this triangle
1:3 -> 0; 3:5 -> 6

ongeveer een jaar ago

Solved


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...

ongeveer een jaar ago

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