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How can we plot the same time history plot two times but the second time with a time delay of 2 sec?
You mean t = 0:0.1:20; p = t.^2; hold on plot(t,p,'b') plot(t+2,p,'r') hold off grid on ?
etwa 8 Stunden vor | 0
plotting 2 figures in same for loop
figure hax1=axes; hold(hax1,'on') figure hax2=axes; hold(hax2,'on') x=1:5; for i=1:6 if rem(i,2)==0 scatter...
ein Tag vor | 0
| akzeptiert
Solving differential equations with state variables and co-states
This code works, but gives no solution for the parameters given. %% Title: Solving Hamiltonian Objective Function using system ...
4 Tage vor | 1
Finding if the current data value is greater than the previous value
It would help if you include the GDF-file. Without further information, I'd suggest T = readtable ("GDF.xlsx"); A = table2arr...
6 Tage vor | 2
| akzeptiert
How to multiply different size arrays and multiply each element by each element?
If nothing helps, make a 4-fold nested loop. for i=1:numel(Span) for j = 1:numel(MAC) for k = 1:numel(CoM) ...
10 Tage vor | 0
Combine non integer time steps into daily values
@Cristóbal Looking at the volume values, I'm almost sure that these values are already cumulative values. Why should the increa...
12 Tage vor | 2
Programming wave dispersion equation
Code taken from https://uk.mathworks.com/matlabcentral/fileexchange/156009-wavelength-calculation-based-on-dispersion-relations...
13 Tage vor | 0
| akzeptiert
Modelling a system of differential equations with recurrences in matlab
N = 20; k = 1; a = 1; b = 1; c = 1; d = 1; u0 = zeros(N,1); udot0 = 0.5*ones(N,1); v0 = zeros(N,1); vdot0 = 0...
14 Tage vor | 0
| akzeptiert
How can received my license?
Either through the IT department of your university or - if you have an individual licence - by contacting MATLAB support: http...
14 Tage vor | 1
Please help me to solve this simple error
@Walter Roberson answered the question about your MATLAB error. Concerning the problem you try to solve: I assume d1, d2 are ...
14 Tage vor | 0
Curve fitting with a custom equation
Only round brackets are allowed in your expression. But maybe there are additional problems. If the code does not work after r...
16 Tage vor | 0
Trying to figure out a algorithm to filter out some data, since I dont have any additional toolbox.
load("eeandv.mat") tol = 0.005; idx = abs(diff(e)) <= tol; e = e(idx); v = v(idx); plot(v,e) grid on; grid minor; xlim([...
17 Tage vor | 1
I want to avoid fractions in my answer to the null space
Insert for i = 1:size(N_A,2) [~,d] = numden(N_A(:,i)); N_A(:,i) = N_A(:,i)*lcm(d); end after computing N_A.
22 Tage vor | 0
Prevent "any Matlab service" from loading on Windows 11 startup.
Follow the instructions given here: https://uk.mathworks.com/matlabcentral/answers/101038-why-is-matlab-always-running-in-the-b...
28 Tage vor | 0
why does set(gca) not working
The set command must be placed after the plot command, not before: FONT_SIZE = 16; max_iter = 10; x = 1:max_iter; % this is t...
29 Tage vor | 0
| akzeptiert
Naming Table Variables of a File
load("T.mat") T1 = splitvars(T); T1 = renamevars(T1,["rows_1" "rows_2" "rows_3" "rows_4" "rows_5" "rows_6"],... ...
29 Tage vor | 1
| akzeptiert
Error using countOnes = sum(num); when trying to count how many zeros and ones are randomly generated.
Works in R2025A (see above). I suspect that somewhere in your code, you define a variable with name "sum". Rename it because it...
etwa ein Monat vor | 1
Please i need to plot 3 dimension figure with (x axis is x, y axis is gamma function) and z axis is value of u for this simple attached relation
We don't know your problem, but it should work somehow like this. What do you mean by "the y-axis is the gamma function" ? Do ...
etwa ein Monat vor | 0
Plot: index exceeds array bounds ("Index in position 1 exceeds array bounds. Index must not exceed 1.")
Rename the struct "plot" which appears in your workspace. It's probably in conflict with MATLAB's "plot" function.
etwa ein Monat vor | 1
| akzeptiert
Plotting sum of two vectors
%Parameters or =0.2; oc = 0.2; gamma = 0.01; gam=0.01; Gamma = 1; Gamma1 = Gamma; Gamma2 = Gamma; Gamma3 = 9/10; Gamm...
etwa ein Monat vor | 0
| akzeptiert
ilaplace doesn't handle tanh()
You mean syms s T P2 = ilaplace( 1/s*(exp(s*T/4)-exp(-s*T/4))/(exp(s*T/4)+exp(s*T/4)) ,s); Tsteps = 0.1:0.5:20; num = vpa(su...
etwa ein Monat vor | 1
Fitting 8 equations simultaneously with three parameters
If all 8 equations are linear in the fitting parameters like in your example from above, "lsqlin" instead of "lsqnonlin" would b...
etwa ein Monat vor | 2
| akzeptiert
Partial Differential equation: Createpde. f as afunction
Take a look at the example "Coefficient Handle for Nonconstant Coefficients" under https://uk.mathworks.com/help/pde/ug/pde.p...
etwa ein Monat vor | 0
Neumann boundary condition in a diagonal matrix
For fun, I computed eigenvalues and eigenfunctions for the full region with boundary condition u = 0 and for the quarter region ...
etwa ein Monat vor | 0
Neumann boundary condition in a diagonal matrix
The Laplace operator is discretized as (u(x+h,y) - 2*u(x,y) + u(x-h,y))/h^2 + (u(x,y+h) - 2*u(x,y) + u(x,y-h))/h^2 If y = 0 an...
etwa ein Monat vor | 0
Error while running my objective function by fmincon with nonlinear constraint for calculate optimization coordination overcurrent relay
So far, it seems to work. The constraint function is missing. % main_optimization.m % The main script for solving protective...
etwa 2 Monate vor | 0
Please help explain it
1) asks you to plot y1(x) = x + cos(x), y2(x) = -0.5 and y3(x) = 0.5 and see where y1 and y2 resp. y1 and y3 intersect. 2) a...
etwa 2 Monate vor | 2
I'm encountering the following error when I run my main program.
Do you see the problem ? a = rand(4,5) a(1:3,4:6) "ymax" is bigger than the second dimension of the array "topo", namely 1440...
etwa 2 Monate vor | 0
| akzeptiert
Rotate 3D mesh plot to show 2D view of X data on vertical axis and Z data on horizontal axis
x = -2:0.1:2; y = 0:0.1:1; [X,Y]=meshgrid(x,y); Z = X.^2+Y.^2; mesh(Z,Y,X) xlabel('Z') ylabel('Y') zlabel('X') view(0,0)...
etwa 2 Monate vor | 1
| akzeptiert
Matlab numerical simulation for ode system by changing the parameter value in range graph not running error coming
Your ODE system is stiff. Use "ode15s" instead of "ode45". The reason for the error you receive seems to be that you interrupte...
etwa 2 Monate vor | 1
| akzeptiert
