PLOT from summing series.

Question

0 个投票

Good night guys. I have the following problem above:

A = 1;

e = 1;

y = 2.5*10^-3;

Tmol = 40;

TiNJ = 250;

for t = 0:20

S = 0;

for n = 0:10000

x1 = (-1)^n/((n+1/2)*pi);

x2 = exp((-(n + 1/2)^2)*pi^2*A*t/e^2);

x3 = cos((n + 1/2)*pi*y/e);

S = S + x1*x2*x3;

end

Tyt = Tmol - 2*S*(Tmol - TiNJ);

[Tyt,t]

end

To sum up, this little code will generates 20 points (Tyt,t pairs), i want a plot for that.

I could plot manually doing plot(x1,y1,x2,y2...) but how i plot automatically when the program ends the 20 points?

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Answer 1

Fangjun Jiang 2011-9-2

0 个投票

You need to store your data in a vector:

Before your 'for t=0:20' line, insert a line: 'Tyt=zeros(21,1);' Change the assignment of Tyt to be 'Tyt(t+1)=Tmol - 2*S*(Tmol - TiNJ);'.

At the end, plot(0:20,Tyt); or plot(Tyt,0:20); depending on your need.