How to plot summation equation

how to plot this function with a summation sign? and it should look like this

[KALYAN ACHARJYA]

symsum

Answer 1

[KSSV]

You need to proceed like below:

n = 1000 ;   % you can change it if you want 
% define your constant values below 
k = 1 ; 
t = 1 ; 
l = 1 ; 
Ss = 10 ; 

hl = 5 ; 
% Make n a vecor 
n = 1:n ; 
% Given function 
h = @(x,t) 2/pi*hl./n.*sin(n*pi*x/l).*(1-exp(-k*n.^2*pi^2*t/(Ss*l^2))) ; 

x = 0:0.5:1 ;   % possible x values 
p = zeros(size(x)) ;  % save the sum for eac function 
for i = 1:length(x)
    v = h(x(i),t) ;
    p(i) = sum(v) ;
end
plot(x,p)

Check the code thoroughly...the above can also be obtained without loop. You need to run a loop for t.