How can I use a for loop to find the summation of a set variable and set number of terms

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macabe banchero 2018-3-7

0
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https://ww2.mathworks.cn/matlabcentral/answers/386795-how-can-i-use-a-for-loop-to-find-the-summation-of-a-set-variable-and-set-number-of-terms

评论： macabe banchero 2018-3-7

So I was given the task of creating a UDF that has to do the following:(1) accepts input values for a variable, x, and a set number of terms N.(2) calculate the value of f(x) using N terms and (3) return output value of f(x). Here is what I have so far:

x = input('variable x'); 
n = input('number of terms, n');
for N = (0:n)
  y = sum(x.^N)
end

When I enter in x=2 and n=6 for example, I know the answer is supposed to be 127. But I am not getting the answers summed up, but separate instead. How do I fix this? Thanks.