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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...
quasi 4 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
quasi 7 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
quasi 7 anni fa | 1 risposta | 2
1
rispostaDomanda
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...
oltre 7 anni fa | 1 risposta | 0
1
rispostaDomanda
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 ...
oltre 8 anni fa | 0 risposte | 0
0
risposteDomanda
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_(...
oltre 8 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
quasi 9 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
circa 9 anni fa | 0 risposte | 0
0
risposteDomanda
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...
quasi 10 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
quasi 10 anni fa | 1 risposta | 0
1
rispostaDomanda
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...
quasi 10 anni fa | 0 risposte | 0
0
risposteDomanda
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...
oltre 10 anni fa | 3 risposte | 1
3
risposteDomanda
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...
oltre 10 anni fa | 1 risposta | 1
