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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([...

10 mesi fa | 1

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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.

10 mesi fa | 0

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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...

10 mesi fa | 0

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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...

10 mesi fa | 0

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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"],... ...

10 mesi fa | 1

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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...

10 mesi fa | 1

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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 ...

10 mesi fa | 0

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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.

11 mesi fa | 1

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Risposto
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...

11 mesi fa | 0

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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...

11 mesi fa | 1

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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...

11 mesi fa | 2

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Risposto
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...

11 mesi fa | 0

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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 ...

11 mesi fa | 0

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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...

11 mesi fa | 0

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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...

11 mesi fa | 0

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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...

11 mesi fa | 2

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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...

11 mesi fa | 0

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Risposto
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)...

11 mesi fa | 1

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Risposto
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...

11 mesi fa | 1

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Risposto
function input arguments error
Don't use isreal as a variable name: isreal is a MATLAB function that you overwrite this way. [y, is_real] = myquad(1, -2, 1); ...

11 mesi fa | 0

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How to assign the multiple outputs of a function to a single vector AVOIDING TO MANUALLY ASSIGN EACH OUTPUT?
https://uk.mathworks.com/matlabcentral/answers/1808900-multiple-outputs-of-a-function-into-a-single-vector

11 mesi fa | 1

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define 300 function calls x1(t)---x300(t)
You shouldn't use the way described here https://uk.mathworks.com/help/symbolic/solve-semilinear-dae-system.html to define a D...

12 mesi fa | 0

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Solve Semilinear DAE System
I am not sure what Y is in these two lines. Y is the (numerical) vector of unknowns - in the example Y = [x,y,T,dx/dt,dy/dt]. ...

12 mesi fa | 0

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Getting an empty figure for ( amplitude vs rotor speed)
You get amp = NaN as result, and NaN values are not plotted.

12 mesi fa | 0

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Calculate expm(m*A*t/n) from expm(A*t/n)
Your question is how to get expm(c*A) given A for a scalar c. Diagonalize A such that A*V = V*D. It follows that (c*A)*V = V*...

12 mesi fa | 0

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Risposto
Gradients not recorded for a dlnetwork VAE
Did you read the documentation on how "dlgradient" is to be applied ? https://uk.mathworks.com/help/deeplearning/ref/dlarray.dl...

12 mesi fa | 0

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Risposto
Access Denied to a folder created by the script
You create C:\Users\HP\Documents\MATLAB\Simulations\Sim_DOA_-60deg as a folder. But WriteOpenEMS(Sim_Folder, FDTD, CSX); a...

12 mesi fa | 1

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How do I get bold formatted subscript mathematical expressions in MATLAB using LaTeX?
x = 0:10; y = x; plot(x,y) xlabel('$g_{\mathbf{\mathit{R}}}$','interpreter','latex')

12 mesi fa | 0

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Help with Difference Equation in MATLAB
If V_i, h_i, C, K and theta_0 and theta_1 are given, you can solve for theta_(i+1) and compute theta in a loop. theta(i+1) = ((...

12 mesi fa | 0

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Integrations of Bessel functions
For the first integral I_1, see https://math.stackexchange.com/questions/393399/integral-of-product-of-bessel-functions-of-the-...

12 mesi fa | 0

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