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Is there an appropriate fitting methods for data that as orders of magnitude differences
Hi I want to fit my data to a nonlinear equation that I have. This is to extract the equation parameters. I tried to use lsqcur...

3 years ago | 1 answer | 0

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parfor Vs muliple matlab session
I need to run my code multiple times with different parameters. What I've done so far is to open several matlab windows (until m...

6 years ago | 1 answer | 0

1

answer

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Cancel the auto scroll down in the command window
My code includes the disp() function inside a loop, so at the command window it displays a lot of lines. When I scroll-up to se...

6 years ago | 1 answer | 2

1

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Which is faster, the sparse or spdiag function?
In each iteration of a for loop I'm creating a big (approximatlly 10k*10k) five diagonal sparse matrix. Does anybody knows which...

6 years ago | 1 answer | 0

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Extract data from sparse matrix in a parfor loop
Hi, I need to find eigenvectors and eigenvalues for a lot of 100*100 tri-diagonal matrices. they defined as follow: A_kk ...

7 years ago | 0 answers | 0

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fast solution for matrix multiplication
I have the following expression of the matrix elements B_(l,m): B_(l,m)=Sum(over k=0 to N) of a_(l,k)*a_(m,k+1)+a_(l,k+1)*a_(...

7 years ago | 1 answer | 0

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How can I Identify Boundary Labels when writing a PDE code (not with the pdetool)?
I want to solve the Laplace equation using MATLAB, without using the PDE app. I first created a geometry which includes several...

7 years ago | 1 answer | 0

1

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need halp with simbolic summation?
I solved the laplace equation and I got a discrete vector of coefficients (A_n) with 100 coefs (n=100) now the solution is lo...

8 years ago | 0 answers | 0

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mldivide, backslash \ operator options
Hello, I'm solving the system x=A\B; the size of A is is around [1e6 x 1e6] and is a symmetric and sparse matrix with 5 n...

8 years ago | 1 answer | 0

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Question


plot gradient of pde
Hi, 1) I solved the laplace equation and found the electric field using: u= assempde(b,p,e,t,c,a,f); %laplace equation on...

9 years ago | 1 answer | 0

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solve multiple implicit coupled equations?
How can I solve this system of equations? I0=-1*a+b*(exp(v0/c)-1); I1=-2*a+b*(exp(v0/c)+exp(v1/c)-2); I2=-3*a+b*(exp(v0...

9 years ago | 0 answers | 0

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refine mesh in PDEModel
Hello, I'm trying to solve a laplace equation using PDEModel. I created the mesh object like this: model=createpde; msh=g...

9 years ago | 2 answers | 1

2

answers

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Set Neumann Boundary Conditions to PDEModel
Hello, I want to solve the Laplace equation on a 2-D rectangular grid. I'm using the "applyBoundaryCondition" function to determ...

9 years ago | 1 answer | 1

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