Answered
¿Por que me aparece el error de Incorrect number or types of inputs or outputs for function applyBoundaryCondition en mi codigo?
Instead of "edges", you have to include the edge number to which you want to apply the boundary condition. I plotted the geomet...

2 years ago | 0

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Fitting multiple curves with multiple data sets, partial and globally shared parameters using lsqcurvefit
rng("default") b1 = 1; b2 = 0.85; b3 = 2.5; b4 = 1.1; b5 = 2.2; b6 = 4.5; b7 = 1.3; b8 = 7.2; b9 = 9.5; b10 = 0.5; %x data ...

2 years ago | 0

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Answered
Why is this matlab program not able to solve accurately?
Some equations cannot be solved analytically because they are too complicated or because there are no functions available that c...

2 years ago | 1

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Answered
I want to perform this time derivative?
From your description, you have 412 different dV_c/dt curves over time, one curve for each distance X. And now ? Do you want to...

2 years ago | 0

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Answered
NLP problem with fmincon: Non-differentiable point in objective function
The solution variables for "fmincon" must be continuous in order to compute gradients, Hessians etc. Therefore, the solver is no...

2 years ago | 0

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solving nonlinear wave equation
Using the method of characteristics, you get the equations dt/ds = 1 dx/ds = v_max*(1-2*rho/rho_max) drho/ds = 0 You should ...

2 years ago | 2

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Answered
Is it possible to create a distribution fit (preferably gaussian mixture distribution model) for a distribution with precalculated bincounts?
The bincounts define a probability distribution. Draw random numbers from this distribution - they can be used as data in "fitdi...

2 years ago | 0

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How can i solve this eqaution in matlab?
I still don't understand where you can change t=0.1 s, t=20 s, t=60 s, but here we go: Rho_f = 920; %kg/m^3 Dp = 0.152; % m m...

2 years ago | 0

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How can i solve this eqaution in matlab?
Rho_f = 920; %kg/m^3 Dp = 0.152; % m m_dot_oxi = 7.95; %kg/s n = 0.75; m = -0.15; a = 2.006e-5; Rp = Dp/2; % m A = pi*(Rp...

2 years ago | 0

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Answered
Finding accurate inverse of binary circulant matrix
BCM=readmatrix('MixingLayer.xlsx'); inv(gf(BCM,2))

2 years ago | 0

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finding value in 2d array function of x and y
Given (vehicle.wheeltorque ,vehicle.wheelspeed), use pdist2 to compute the distances to the column vectors of the matrix [Torque...

2 years ago | 0

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How do I sort these 2D-Points to get a proper surf plot of this function
x = linspace(-1,1,1000); y = linspace(-1,1,1000); [X,Y] = meshgrid(x,y); Z = nan(size(X)); idx = X.^2+Y.^2 <= 1; Z(idx) = 1...

2 years ago | 1

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Answered
how to read mat file in matlab
https://uk.mathworks.com/help/matlab/ref/load.html

2 years ago | 0

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Proving one function is greater than other?
syms x y f = 53.989/21.233 * (log(log(x))).^(4/3)./(log(x)).^(1/3); %x is solution where f starts getting greater than 1 xsta...

2 years ago | 0

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Multicomponent gas separation in hollow fiber membranes
par.thickness_membrane = 1e-6; % thickness membrane [m] par.Perm_H2 = 250*3.35e-16; % Permeability H2 [mol m/m2 s Pa] par.Per...

2 years ago | 0

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Answered
How should I set the value of u_tau?
The problem simply is that you cannot solve delay PDEs with "pdepe", at least not directly. A possible remedy: Call "pdepe" in...

2 years ago | 0

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Calculate the summation of second column in both arrays
array = [2 5;7 -4]; sum(array(:,2))

2 years ago | 0

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Answered
Function with multiple input parameters to be determined through fitting
You have to use "integral" instead of "int" and loop over the elements in E_p: EM_SS([1 1 1 1 1 1],1) function F = EM_SS(p, e_...

2 years ago | 0

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Answered
How to solve a system of nonlinear differential equation that follows some pattern
function dy = fun(t,y) dy = y.*[y(2:end);y(1)] end or a function handle fun = @(t,y) y.*[y(2:end);y(1)]

2 years ago | 1

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Interpolating the y values of a dataset A to correspond to the x values of dataset B.
The easiest way I can think of is y1_at_x2 = interp1(x1,y1,x2) If it's precise ? Define precise. At least you have the choice ...

2 years ago | 1

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Answered
Hi, i try to solve equation c in terms of other variables, and its appear the messages and the answers is not as expected. Is supposed to be beta/p^(1/sigma)? is it?
Maybe you want to restrict the parameters to be positive (and thus real-valued): syms beta c sigma p positive eqn1 = beta/c^si...

2 years ago | 0

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How to solve 3 linear equations symbollically?
The first two equations in "velocity_eq" only have "omega_output_z" as variable and contradict each other (see above).

2 years ago | 1

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Answered
Problem with matrix dimensions
In "sistema", I made F a column vector by adding a last line as F = F(:); and it works.

2 years ago | 0

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Nonorthogonal eigenvectors for general eigenvalue problem with eig() and eigs()
From the documentation: [V,D] = eig(A,B) returns diagonal matrix D of generalized eigenvalues and full matrix V whose columns a...

2 years ago | 0

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Finding the minimum distance between two matrices
https://uk.mathworks.com/matlabcentral/fileexchange/34869-distance2curve Use one matrix to generate the curve and the other dat...

2 years ago | 0

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How to solve a fourth order differential equation (boundary value problem) with constraint?
And as far as I see, a necessary and sufficient condition that w'''' is bounded on [0 l] is w(0) = 0, and that's what you alread...

2 years ago | 0

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How to delete variables in a table within a cell array
for i=1:10 c{i}(:,1:2) = []; end

2 years ago | 0

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Index in position 1 exceeds array bounds. Index must not exceed 1.
A is a single value, namely A = b*h + z*h^2; % Cross-sectional area (m^2) But in your double loop, you treat A as if it we...

2 years ago | 0

Answered
Why are these interations not working?
x1 = 16/2; y1 = 25/5; fyx = -1/2; fxy = 1/5; x2 = fyx*y1 y2 = fxy*x1; x3 = fyx*y2 y3 = fxy*x2; x4 = fyx*y3 y4 = fxy...

2 years ago | 0

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Answered
Crank-Nicholson method
I suggest the following code: xstart = 0; xend = 1; tstart = 0; tend = 1; nx = 10; nt = 100; x = linspace(xstart,xend,nx)...

2 years ago | 0

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