f

#### Function : Output argument "out" (and maybe others) not assigned during call to

```My Principal function :
function [out] = Cf( t,x )

LAMBDA=0; %constante de décroissance du soluté
b=10^-3; %demi-largeur de la fente
Dm=10^-10; %%coefficient de diffusion dans la matrice
Vf=10^-5; %%vitesse d'advection dans la fente
Xc=10^-1; %%profondeur de fracture
Tc=Xc/Vf; %%temps advectif correspondant à la profondeur de fracture
Zc=sqrt(Dm*Tc); %%longueur de diffusion dans la matrice
beta=b/Zc;
%ZETA=z/Zc;

T=1; %%temps final adimensionné par Tc
nt=50;
dt=T/nt;
t=[0:dt:nt*dt];

X=1;
nx=100;
dx=X/nx;
x=[0:dx:nx*dx];

%%Advection dans la fente selon Ox
Cf=zeros(nt+1,nx+1);

for i=1:nt+1
for j=1:nx+1
if(t(i)-x(j)>0) %%heaviside(t(i)-x(j))
Cf(i,j)=0.5*exp(-0*t(i))*x(j)/beta/(pi*(t(i)-x(j))^1.5)*exp(-x(j)^2/4/beta^2/(t(i)-x(j)));
end
end
end

%%Tracé de Cf en fonction de x à des temps donnés :
Anim_cf_t=moviein(length(t));
for i=1:length(t)

Anim_cf(i)=getframe;
plot(x,Cf(i,:),'b')
xlabel(i)
axis([0 1.2 0 10]);
end

%%Tracé de Cf en fonction du temps pour x donné :
Anim_cf_x=moviein(length(x));
figure;
for k=1:length(x)

Anim_cf(k)=getframe;
plot(t,Cf(:,k),'r')
xlabel(k)
axis([0 1.2 0 10]);
end
end

My function :

function A = Cmax( t )
x=0.001;
while Cf(t,x)<=Cf(t,(x+0.001))
x=x+0.001;
end
Cmaxi=Cf(t,x)
Xmaxi=x
A=zeros(1,2)
A(1,1)=Cmaxi
A(1,2)=Xmaxi
end

When I run my function Cmax, I have this message and I don't understand where is my problem...

>> Cmax(15)
Error in ==> Cf at 3
LAMBDA=0; %constante de décroissance du soluté

??? Output argument "out" (and maybe others) not assigned during call to "C:\Users\Matthieu\Desktop\BE
MATLAB\Cf.m>Cf".

Error in ==> Cmax at 3
while Cf(t,x)<=Cf(t,(x+0.001))

If someone can help me, Thanks
``` 0  Matthieu
1/15/2011 12:49:05 PM comp.soft-sys.matlab  211264 articles. 26 followers. 1 Replies 8243 Views Similar Articles

[PageSpeed] 48

```On 15/01/11 6:49 AM, Matthieu wrote:
> My Principal function :
> function [out] = Cf( t,x )

In order to return a value from a function that way, the return value
must be assigned to the variable you named on the left hand side ("out")
and not to the name of the function ("Cf")
``` 0  Think
1/15/2011 1:34:16 PM Similar Artilces:

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