Loop function takes too long. How can I reduce the processing time?
Yes, diff in as inbuilt and vectrorized function to get what you want. Run this command on a vector input will give you all the ...

8 months ago | 0

Splitting code into groups
Note that the run button will run all your code in one, while the other buttons will run you code section wise and go / go not t...

8 months ago | 0

Solution to a simple equation
use isolate instead of solve: clear all; close all; syms R L C omega eqn=1 - 2*C*L*omega^2 + C^2*R^2*omega^2 + C^2*L^2*omega^...

9 months ago | 0

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how to make a function of this system
syms a b y1(t) y2(t) ode(1,1) = diff(y1,t,2) == a*y2 - cos(diff(y1,t)); ode(2,1) = diff(y2,t) == b*y1 + cos(t) [V,S] = od...

9 months ago | 1

error with plotting graph
Since theta is a vector you need to perform elementwise multiplication: a = 13; c = 17; k = 2*pi/3; theta = 0:0.0001:2*pi; ...

9 months ago | 1

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; ...

9 months 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 =...

9 months ago | 1

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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...

9 months ago | 1

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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 ...

9 months ago | 0

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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...

9 months ago | 1

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

9 months ago | 0

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 ...

9 months ago | 0

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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)

9 months ago | 0

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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...

9 months ago | 0

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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...

9 months ago | 0

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

9 months ago | 1

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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);...

9 months ago | 0

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

9 months ago | 1

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

9 months ago | 0

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...

9 months ago | 0

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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...

9 months ago | 0

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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

9 months ago | 0

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(...

9 months ago | 1

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 ...

9 months ago | 1

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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...

9 months ago | 0

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.*...

9 months ago | 0

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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))

9 months ago | 2

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...

9 months ago | 0

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]; %...

9 months ago | 0

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