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# Erivelton Gualter

### Cleveland State University

90 total contributions since 2019

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Generating random number, mathlab
help rand random_number = rand(1)

1 jour ago | 0

Help to Generate triangle wave
There is a function you might use for this task called sawtooth. You might find some help in this page. t = -.4:0.001:.4; ...

1 jour ago | 0

how will I replace a string with another string without using strrep?
If you still want to keep your line of thought instead of using Bhaskar approach, which is simpler, you can: % Example entries ...

9 jours ago | 0

Question

Is there an alternative way to perform the following matrix transformation?
Is there a better way to perform the following operation. For example, for the following matrix: A = 1 13 25 ...

20 jours ago | 2 answers | 0

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How do i find x in an equation using the solve command?
Do you have Symbolic Math Toolbox? Try the following: syms x fcn = x-2; solve(fcn == 0)

20 jours ago | 1

Why is my plot blank? (New to MATLAB)
Try the following: x = -pi:.1:pi; for i=1:length(x) S(i) = (2.*heaviside(x(i)))-1; end figure plot(S,x,'-r*'); axis([...

20 jours ago | 0

Find set of values that are unique to the values in another column
% Mqtrix A =[2 3; 2 6 2 8 4 5 5 9 5 39 5 6] % Get unique values on first collumn un = unique(A(...

20 jours ago | 0

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Extract Min, Max and mean values for each month of each respective year. (Excel Data)
%% Initialize variables. filename = 'temptable.csv'; delimiter = ','; startRow = 3; %% Format for each line of text: form...

20 jours ago | 0

How can I ready a m file form a exe program?

20 jours ago | 0

I'm trying to define a simbolic variable like ¨ syms x ¨. I used to do it but now It doesn't work..
Maybe you do not have the Symbolica Package installed or do not have license. Run the following comand on command windows: ver ...

20 jours ago | 1

Help !! Problems Using fmincon
I see that you already have choose your solver, which is fmincon. Go over on the Description of the solver and note it contains ...

20 jours ago | 1

How do I compare to matrices with each other?
If I understood right, you want to compare the first 1000 rows of these two matrix. % Sample Matrix A = rand(1000, 3); B = ra...

21 jours ago | 1

Running a calculation for an entire array and putting the results into a new array
% Given A as: A = 1:194; % We can simply solve the following: B = 2+2./A;

21 jours ago | 0

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How to plot individual data on a 2D line graph
See the following example: % Sample Data x = 0:.1:2*pi; y = sin(x); % Find maximun value [max_point, idx] = max(y); fi...

21 jours ago | 1

Producing outputs from loop
for N=1:1068 [pks,locs] = findpeaks(xMatrix(:,N),'MinPeakDistance',20,'MinPeakHeight',750); B = rmoutliers(pks,'mean')...

21 jours ago | 0

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for loop for reading numbers from a matrix in each row
% Matrix a a =[1 2 4; 3 4 5; 5 6 2] % Get size of a [n, m] = size(a); % Run throu...

21 jours ago | 0

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concatenate column values in a vector
You can use the following line of code: v2 = sum(v1*diag(10.^(length(v1)-1:-1:0)));

21 jours ago | 1

Give me some help to solve this problem ?
First, your code shows two different variables: BW and bw. Also, you might adjust the binarization with some threshold. BW = i...

21 jours ago | 1

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Add text to individual frame using Videowriter.
See the following functions: text or annotation.

21 jours ago | 0

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matlab not reading images from folder in correct sequence
It had happened to me before. The problem is the files name is sorted in according to the strings. Let's say you have the follo...

21 jours ago | 0

How to sum the minor number of each line in a matrix?
Given matrix A as: A = [9 6 3; 8 5 2; 7 4 1]; % Sample Matrix minA = min(A,[],2); % Ret...

21 jours ago | 0

creating a matrix from two sets of data
Here is a possible solution: x = [1 2 3 4]; y = [1;2]; nx = length(x); c(1:nx,1) = x; c(1:nx,2) = y(1); c(nx+1:2*n...

22 jours ago | 0

creating a matrix from a column vector
Lets say you have your signal (EEG_signal): EEG_signal = rand(1,136704); % Sample SIgnal You can reshape this on matrix format...

22 jours ago | 0

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Solved

Back to basics 8 - Matrix Diagonals
Covering some basic topics I haven't seen elsewhere on Cody. Given an input vector of numbers, output a square array with the...

22 jours ago

Solved

Create an index-powered vector
Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

22 jours ago

Solved

Change the sign of even index entries of the reversed vector
change the signs of the even index entries of the reversed vector example 1 vec = [4 -1 -2 9] ans = [9 2 -1 -4] example2...

22 jours ago

Solved

Return the largest number that is adjacent to a zero
This example comes from Steve Eddins' blog: <http://blogs.mathworks.com/steve/2009/05/27/learning-lessons-from-a-one-liner/ Lear...

22 jours ago

Solved

Find the nearest integer
Given a vector of integers and a real number find the closest integer. EX: >> a = [2 4 5 6 8 10]; >> b = 4.6; >> nea...

22 jours ago

Solved

Count up then down
Create a function that produces counting up from 0 up to n then down to 0 n=2 --> 0 1 2 1 0 n=3 --> ...

22 jours ago

Solved

Squaring Matrix
Square the following matrix using matlab % A = 1 2 3 4 5 6 7 8 So new matrix should display...

22 jours ago