Attempt to execute SCRIPT pdepe as a function:
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Hi dears
I have problem with executing this program. Can anyone explain me what is going on here? /
Attempt to execute SCRIPT pdepe as a function: /Applications/MATLAB_R2019b.app/toolbox/matlab/funfun/pdepe.m Error in kpz (line 7) sol = pdepe(m,@heat1D,@heatIC,@heatBC,x,t);
opts = odeset('RelTol',1e-8,'AbsTol',1e-8);
N=200; xi=0; xf=5; ti=0; tf=5; TIME=tf-ti;
x = linspace(xi,xf,N);
t = linspace(ti,tf,200);
m = 0;
tic
sol = pdepe(m,@heat1D,@heatIC,@heatBC,x,t);
toc
w = sol(:,:,1);
surf(x,t,w)
xlabel('x')
ylabel('t')
zlabel('w(x,t)')
view([40 55])
%plot(w(200,:))
function [c,f,s] = heat1D(x,t,w,dwdx)
D=4; %0.2;
c = 1;
f = D*dwdx;
s = 1.5*dwdx.^2; %% NO NOISE
%s = 1*dwdx.^2 - 0.5/t; %%White
%s = 0.5*dwdx.^2 - 1/(x*sqrt(t)); %%Pink
%s = -0.5*dwdx.^2 - 0.5/(x*x); %%Brown
%s = 10.5*dwdx.^2 - 0.1*exp(-x*x/t)/t; %%Gauss
end
function w0 = heatIC(x)
w0=2;
end
function [pl,ql,pr,qr] = heatBC(xl,wl,xr,wr,t)
pl = wl;
ql = 0;
pr = 0;
qr = 1;
end
댓글 수: 2
madhan ravi
2020년 3월 21일
which pdepe -all % what do you get ?
You have a script named "pdepe.m" probably rename or remove it.
채택된 답변
Cris LaPierre
2020년 3월 21일
Your code runs as is for me. Perhaps you have overwritten the pdepe function? Try clearing it by typing
clear pdepe
Run the code again. If you still get the error, try typing
which pdepe
The result should be something like this
C:\Program Files\MATLAB\R2020a\toolbox\matlab\funfun\pdepe.m
댓글 수: 14
Cris LaPierre
2020년 3월 21일
편집: Cris LaPierre
2020년 3월 21일
This error suggests that MATLAB is finding multiple files called pdepe.m. Let's see what files MATLAB is seeing. What is the result of
which pdepe -all
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