hi friends. I am writing a code to solve a mathematics problem. I have an expression which includes several variables. I should write the series of this expression over one of the variables and then assign variables using subs function. My code is here:
syms x y L n real
I must mention that this series is derived from Fourier series of "Q" and after this series I should assign variables (L,x,y) by subs function. The problem is that it doesn't give me the right answer. and also when I type this:
subs(sigmax_tot,[x y L],[0 0.25 2])
It gives me 3050 but when I type:
subs(sigmax_tot,[x y L],[0 -0.25 2])
The answer is: symprod((500*(16*cosh((pi*n)/2) + 2*pi^2*n^2 - 16))/(pi^2*n^2 - 8*cosh((pi*n)/2) + 8), n, 1, Inf) - 3050
and also I can not plot the sigmax_tot over because it gives me this error: "Undefined function 'symprod' for input arguments of type 'double'." can anyone help me to write the appropriate code for this series??