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Stephan


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1.485 total contributions since 2017

Knowledge means knowing where it is written...

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Answered
Getting error with the code in ode45 function
t=[0 5]; inity = 1; [t,y]=ode45(@f, t, inity); plot(t,y) function dy = f(~,y) % y=[9,100]; dont overwrite y D=0.00000001; ...

etwa 3 Stunden ago | 0

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Answered
How can I plot the Temperature distribution in this code.
Play arround with slice: % LBM 3D - D3Q15 Heat Diffusion in a Plate % Problem - 5.10 clc clear variables close all alpha =...

etwa 3 Stunden ago | 1

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Answered
How to multiply a matrix to another cell matrix
Use cellfun: A = magic(3) C = {rand(3,4); rand(3,4); rand(3,4); rand(3,4); rand(3,4)} result = cellfun(@(x)mtimes(A,x),C,'Uni...

etwa 3 Stunden ago | 1

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Answered
Why do the ode45 solver is not running in my code?
Your problem appears to be stiff - use ode15s instead: clear; clc; a = 1; %alpha p = 7.5; %rho b = 4; %beta g = 16; %gamma ...

etwa 4 Stunden ago | 0

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Answered
i'm getting this error "Unable to perform assignment because the left and right sides have a different number of elements"
Problem 1 h returns more than one solution which produces the error because the result of xa1(i+1)=I2(i)+h*S2(1) with h bein...

etwa 4 Stunden ago | 0

Answered
All possible combination based on 2^n
n = 3 ff2n(n)

etwa 5 Stunden ago | 0

Answered
percent of similarity between images
When using a neural net you could use the score output argument to get this. Look at this example there is a bar chart based on ...

etwa 8 Stunden ago | 0

Answered
How I can append matrices of different dimensions in another matrix?
A = randi(10, 3, 1) B = rand(4, 1) C = randi(10,5,1) D = vertcat(A,B,C)

etwa 8 Stunden ago | 0

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Answered
Checking if 2 edges in a graph are connected
You could use the neighbors function, which gives a list of connected nodes for a given node. You could combine this with the is...

etwa 8 Stunden ago | 0

Answered
hi guys, I want to make a spectral RollofPoint of speech and when I enter this code from mathworks, I get this error that the variable t1 is not declared, even though I declared it. Please I will be happy for every piece of advice.
You have to run code so that the variables appear in your workspace. go to the editor tab and press "run". the editor tab appear...

2 Tage ago | 0

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Answered
how to remove spaces in a string?
A = ["Ly R4", "Ba R7", "Ty Ru"] B = erase(A," ")

2 Tage ago | 1

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Answered
Using previous value to get the next in for loop
The semicolon operator supresses outputs to the command window: h=0.1; y(1) = 0; for k=2:6003 y(k) = y(k-1) + h.*u(k-1);...

2 Tage ago | 0

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Answered
Converting Cell matrix to a Numeric Matrix
B={'2' '3' '5'; '4' '7' '2'; '7' '5' '2'} C = cellfun(@(x)str2double(x),B)

2 Tage ago | 1

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Answered
extracting droplets with fringes from a image
Have a look at imfindcircles. It might be useful to run imbinarize first.

2 Tage ago | 0

Answered
Multiplication of two different continuous signal in Matlab
You made a mistake in defining t2...t6: x = 0:0.05:6; y = sin(x); subplot(3,1,1) plot(x,y) t1 = 0:0.05:1; t2 = 1.05:0.05:2...

2 Tage ago | 0

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Answered
Datetime coloumn in a matrix of double
You can not mix data types in arrays - use a table or a timetable to do this. In your case the array2table or array2timetable mi...

2 Tage ago | 0

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Answered
Function that returns the number given squared
https://de.mathworks.com/help/matlab/ref/function.html?s_tid=doc_ta#btexm3w

2 Tage ago | 0

Answered
Matlab plot problem line 13
syms r E y K eqn = r*(1-y/K)*y-E*y==0; S = solve(eqn); y1=S(1); y2=S(2); h=0.01; E=1; r=2; K=1; y = double(y1-h:h:subs(...

3 Tage ago | 1

Answered
How to produce square matrix in this form
k = 2; % define how often to repeat the pattern result = toeplitz([5 repmat([1 0 0 0],1,k)]) gives: result = 5 1 ...

3 Tage ago | 1

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Answered
how do i plot a complicated function
alpha = 2; gamma = 3; k1 = 0.5; k2 = 0.15; syms eta(x,y) Eta eta(x,y) = (sqrt((x*k1+gamma*(1-y)-alpha)^2-4*x.*(gamma*k2...

3 Tage ago | 0

Answered
Solve equation (unrecognized function or variable)
% define t as symbolic syms t N = 5.62; R = 6.40; W = 600; eqn = (10 + 2.*W.^(2).*t.^(2) - 8.*W.^(4).*t.^(4))./(10 +23.*...

4 Tage ago | 0

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Answered
How to doI plot F(x) = [1 -(10/x)]/[1-(100/x^2)] for X ranging from 100 to 1100 at an interval of 50?
F = @(x) (1-(10./x))./(1-(100./x.^2)); x_vals = 100:50:1100; plot (x_vals, F(x_vals))

4 Tage ago | 2

Answered
Change frame rate of video file
You are fully right. First read all the frames using the read command for VideoReader. Then make a VideoWriter object and use th...

4 Tage ago | 0

Answered
How to optimise two variables at once
b = 166; %inertance c = 2000; %damping value lb = [0 500]; % lower bound ub = [500 3000]; % upper bound x0 = [b, c]; %...

4 Tage ago | 0

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Answered
How to find every combination of values in a cell array?
One way, using allcomb: M = {[1,2,3], [4,5,6],[7,8,9]; [10,11],[12,13],[14,15]; [16,17,18,19,20],[21,22,23,24],[25,26,27,28]}...

7 Tage ago | 1

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Answered
function in matlap#
https://de.mathworks.com/help/matlab/ref/function.html https://de.mathworks.com/help/matlab/matlab_prog/create-functions-in-fil...

8 Tage ago | 0

Answered
How to ignore negative indices or assign it to zero in a loop
It is not needed to make the elements zero - they are already, because you preallocated y with zeros: x=[1 2 -1 -3 -4] h=[0 1 ...

9 Tage ago | 0

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Answered
Matlab schließt sich sofort nach dem starten wieder
Hallo, in diesem Forum wird fast ausschließlich auf Englisch geschrieben - was die Chance Deiner Frage beantwortet zu werden dr...

9 Tage ago | 0

Answered
Create Block Toeplitz Matrix
Try: rng(123) A = eye(3); B = randi(10,3); Omega = kron(A,B) gives: Omega = 7 6 10 0 0 0 0 ...

10 Tage ago | 0

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