For Loops for Summation Problems

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Shawna Myatt
Shawna Myatt 2018-10-7
评论： jonas 2018-10-7
I need to create a 'for' loop for the following summation:
x1 = 80000 - sum(0.1) from k=1 to k=800000. The point is to show that while this should equal zero, MatLab will add up all the minor errors until it creates one large one.
I have tried reading through the posts on here and watching videos, but I cannot figure out how to enter this into MatLab without getting an error or an infinite loop. I am very new to MatLab, so any help would be appreciated.
Thank you!
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Shawna Myatt
Shawna Myatt 2018-10-7
That is what I thought, but this is exactly how it is written in the problem. I thought it was an error, but there are four different problems like this with slightly different numbers, and none of them include a k value in the summation equation.
jonas
jonas 2018-10-7
Well, looking at your description of the problem, I guess you could do something like this
x1=80000;
for k = 1:800000
x1 = x1 - sum(0.1);
end
x1 =
-1.687279162776445e-07
so the answer is not zero, lesson learned.

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