Numerical values into plot issue

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Cameron Thames
Cameron Thames 2011-11-25
I created a code that takes an initial guess for a distribution and then modifies it. After completing the code it then is supposed to plot the modified distribution, however it is plotting both the guess values and final values. My guess looks something like:
Tfuel = zeros(nr+1);
Tfuel(:) = 800;
The guess is then modified very much like the following statement:
Ttemp=0.5*dr*dr*(qvol/k+Tfuel(i+1)/(dr*dr)+Tfuel(i-1)/(dr*dr)+...
Tfuel(i+1)/(2*dr*dr*i)-Tfuel(i-1)/(2*dr*dr*i));
Ttemp=(1-w)*Tfuel(i)+w*Ttemp;
Tfuel(i)=Ttemp;
I used the basic plot command as:
plot(r,Tfuel)
Any idea why this is occurring? I have never had this issue before.
Thanks
  1 个评论
karan
karan 2011-11-25
use fplot as tfuel is still getting values as it is being used

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采纳的回答

Wayne King
Wayne King 2011-11-25
I suspect maybe you want
Tfuel = zeros(nr+1,1);
instead of
Tfuel = zeros(nr+1);
With the above you are creating a nr+1-by-nr+1 matrix and then with
Tfuel(:) = 800;
You are filling the whole matrix with 800. Then in your loop
Tfuel(1) % or whatever you index i is
You are only filling the first column.

更多回答（1 个）

karan
karan 2011-11-25
Use fplot

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