Function for summing an infinite series using for-end loops

The assignment I have is to create a MATLAB function that calculates the value of a function of x as defined as f(x) = (x^2)/37 + (x^3)/3! + (x^4)/4! + (x^5) +.... and test it with a few sets of data for the x value and nth order in which to evaluate. I have created a function, and yet when I try to evaluate it, the output keeps equaling zero for anything I put in there. I'm not completely sure what I'm doing wrong.

Here's the code for the function:

function [x,n]=my_fun(x,n)
x=zeros(size(x));
S=(x^2)/37;
for ii=3:n
        S=S+((x^ii)/factorial(ii));
end
end

And here's the code for when I try to use inputs:

x=.25;
n=4;

my_fun(x,n)

Any help would be greatly appreciated. I understand what the program is trying to do, it's just the syntax is a little confusing for me at the moment.

Answer 1

[Youssef Khmou]

Chris,

You can start by differentiating between names of input and output variables , then only S is your output :

function [S]=my_fun(x,n)
S=(x^2)/37;
for ii=3:n
      S=S+((x^ii)/factorial(ii));
end
end

[Chris]

Thank you very much, this helped a lot...was making it a lot harder than it actually was.

[Youssef Khmou]

you re welcome, if the problem is solved, you accept the answer .