I am getting NaN values after some iterations in my loop
1 view (last 30 days)
Show older comments
I get NaN values after few iterations using fourier transform this happens every time I add the fourier transform of V*psi into the equation for that I am using fft fxn
X=(-M/2:M/2-1)*dx;
dk=2*pi/(M*dx);
K=(-M/2:M/2-1)*dk;
psi=(1/sqrt(2)).*randn(1,M)+(i/sqrt(2)).*randn(1,M);
V=(X.^2)/2;
Tmax=40;
dt=0.004;
Nt=round(Tmax/dt);
Fpsi=zeros(Nt+1,M);
FVpsi=zeros(Nt,M);
Fpsisq=zeros(Nt,M);
for t=1:Nt
Fpsi(t,:)=fft(psi(t,:));
FVpsi(t,:)=fft(V.*psi(t,:));
Fpsisq(t,:)=fft((abs(psi(t,:)).^2).*psi(t,:));
Fpsi(t+1,:)=Fpsi(t,:)+dt.*(K.*K.*Fpsi(t,:)+FVpsi+g.*Fpsi);
psi(t+1,:)=ifft(Fpsi(t+1,:));
end
0 Comments
Answers (1)
Matt J
on 3 May 2021
To find out where they are first introduced, you can use,
>> dbstop if naninf
2 Comments
See Also
Categories
Find more on Loops and Conditional Statements in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!