Community Profile

# GEORGIOS BEKAS

430 total contributions since 2017

Engineering Optimization specialist

View details...

Contributions in
View by

Question

Creating two row matrices out of any initial matrix that would contain each element inside the initial matrix and the one in the previous column.
I am trying to create two row matices out of an initial matrix. The two row matrices need to contain each element inside the ini...

4 mesi ago | 0 answers | 0

### 0

Question

Problem with my code?
I wrote the following code that is based on reading two csv files that I include. clc clear a = dlmread ('gb.csv') b = d...

4 mesi ago | 2 answers | 0

### 2

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...

12 mesi ago | 1 answer | 0

### 1

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...

circa un anno 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...

circa un anno 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...

circa un anno ago | 2 answers | 0

### 2

Solved

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

circa un anno ago

Solved

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

circa un anno 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 = ...

circa un anno 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' ...

circa un anno 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...

circa un anno 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...

circa un anno 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 ...

circa un anno ago | 1 answer | 0

### 1

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 ...

oltre un anno ago | 0 answers | 0

### 0

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? ...

oltre un anno ago | 0 answers | 0

### 0

Question

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

oltre un anno ago | 1 answer | 0

### 1

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 ...

oltre un anno ago | 0 answers | 1

### 0

Solved

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

oltre un anno 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

oltre un anno 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]

oltre un anno 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...

oltre un anno 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

oltre un anno 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]

oltre un anno 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] ...

oltre un anno 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] ...

oltre un anno ago

Solved

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

oltre un anno ago

Solved

Find the body mass index. For reference, please refer to Wikipedia here: <http://en.wikipedia.org/wiki/Body_mass_index body ...

oltre un anno 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...

oltre un anno 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.

oltre un anno 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:/...

oltre un anno ago