sum of real numbers up to n using recursive code

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Will Murphy
Will Murphy 2020-2-15
评论： Will Murphy 2020-2-16
I'm trying to make more sense of recursive code as I have only very recently started using matlab. I was wondering how I would go about finding the sum of all real numbers up to x using recursive code, I have done it using if / for / while loops however after trying to self teach myself I would expect to go about this by:
function y = sum(x)
if x > 0
y = x * (x+1) / 2
end
elseif x <= 0
y = 'does not exist'
end
end
disp(y)
I understand that I am probably wrong, in which case how would I go better about this task. Any help would be appreciated.
  2 个评论
Image Analyst
Image Analyst 2020-2-15
编辑：Image Analyst 2020-2-15
You can edit the code to fix it you know. So go ahead and add the end.
How are you calling this? What is the initial value of x you're using? I assume the x are all integers, right? Is x a scalar or vector? And you have a finite number of them. Because the sum of all real numbers is infinite.
Will Murphy
Will Murphy 2020-2-16
My apologies, x is a scalar what will equal where the integers finish.

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采纳的回答

David Hill
David Hill 2020-2-15
function x = t_sum(n)
x=1;
if n>1
x=n+t_sum(n-1);%recursive
end

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