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Question
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...
plus de 2 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 5 ans il y a | 1 réponse | 2
1
réponseQuestion
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...
plus de 6 ans il y a | 1 réponse | 0
1
réponseQuestion
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 ...
environ 7 ans il y a | 1 réponse | 0
0
réponseQuestion
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_(...
environ 7 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 7 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 7 ans il y a | 1 réponse | 0
0
réponseQuestion
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...
plus de 8 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 8 ans il y a | 1 réponse | 0
1
réponseQuestion
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...
plus de 8 ans il y a | 1 réponse | 0
0
réponseQuestion
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...
presque 9 ans il y a | 2 réponses | 1
2
réponsesQuestion
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...
presque 9 ans il y a | 1 réponse | 1