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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; ...

mer än 3 år ago | 0

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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 =...

mer än 3 år 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...

mer än 3 år 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 ...

mer än 3 år 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...

mer än 3 år ago | 1

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

mer än 3 år ago | 0

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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 ...

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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)

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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...

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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...

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

mer än 3 år 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);...

mer än 3 år ago | 1

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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)

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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.

mer än 3 år 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...

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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...

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

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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(...

mer än 3 år ago | 1

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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 ...

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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...

mer än 3 år ago | 1

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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.*...

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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))

mer än 3 år 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...

mer än 3 år ago | 1

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]; %...

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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]}...

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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...

mer än 3 år 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 ...

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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...

mer än 3 år ago | 0

Answered
Helo everyone, I want to ask about my error in matlab. Error: File: Untitled5.m Line: 57 Column: 56 -> (rand(1,nvar).*c1.*(pbest(pop,:)x(pop,:))+...) Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or
Line 36: for iter=1:maxiter for pop=1:maxpop % update velocity v(pop,:)=w*v(pop,:)+... rand(1,nvar)...

mer än 3 år 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 ...

mer än 3 år ago | 0