'for loop' summation containing symbolic variable

I tried to carry out a summation in 'for loop' which has symbolic variable in it. but it is showing some errors. I am attaching my script file. Please tell me where I am getting wrong.

Answer 1

[Stephan]

Hi,

some bugs - try:

clear
syms n
Cs=1000;
k=1e8;
D=1e-3;
t=linspace(1e-7,1e-5);
w2n=(n.^2)*pi^2*D/4;
g=((1-(-1).^n)./(n.^2)).*(exp(-w2n.*t)+(k.*(1-(1+w2n.*t).*exp(-w2n.*t)))./(w2n+k.*(1-exp(-w2n.*t))));
sum1 = symsum(g,n,1,250);
plot(t,(1+Cs*(1-(sum1.*4/pi^2))))

Best regards

Stephan

[Aniket Masaye]

Thanks, it works

[madhan ravi]

Interesting this one doesn't have loop either?

[Aniket Masaye]

he edited this file. Before this code had loop.

Answer 2

[madhan ravi]

Use symsum() straight away instead of loop.

[Aniket Masaye]

Actually I want to do it in for loop