MATLAB: Finite-Sum Function

function finite sum

Hello All,

I would like to create a function S_N, that would return the Nth term of a series. Here's what I have so far:

 1 function S_N = S(N)
 2 k = 1:N 
 3 A_k = 1./(k.^(3/2)+k.^(1/2))
 4 S_N = cumsum(A_k)
 5 end

MatLab politely replies:

>> S_N
Error using S_N (line 2)
Not enough input arguments.

I'm not sure what else MatLab wants. I would think this is a pretty simple fix for this uber program. (I can do it perfectly on my TI89 :D)

Much Thanks, Jim

S_N is the output, but the function name is S. Use, e.g.,

S(10)

(you'll need to input a number).

n = 10;
k = 0:n;
S = cumsum(1./(k.^2+1));
plot(k,S)

 n{1} = '0' ;
 n{2} = '01';
 k=3;
    while k<=13
        n{k} = horzcat(n{k-1},n{k-2});
        k=k+1;
    end
    n{end}