Summation with looping
显示 更早的评论
Find ∑((x^)n/n!) for x=1.8 and n=0 to 16.
Okay, my first attempt to do this looked like:
x = 1.8 For(0:16) xs = sum((x^n)/factorial(n)) end
xs
But I received the error: ??? Error: File: imageanalystbs.m Line: 11 Column: 6 Unexpected MATLAB expression.
My line 11 is the one with "For (0:16)"
What am I doing wrong here? Any help is appreciated.
采纳的回答
Paulo Silva
2011-12-5
for n=0:16 is the correct syntax, you are also making another error by doing the summation in every iteration, you should instead find all values and do the summation after the loop ends
x = 1.8
xl=zeros(17,1); %preallocation of the storage
for n=0:16
xl(n+1) = ((x^n)/factorial(n)); %save every iteration result
end
xs=sum(xl) %calculate the sum of the iteration results
it can also be done without loops
n=0:16;
xs = sum(((x.^n)./factorial(n))); %notice the dots
6 个评论
Sean de Wolski
2011-12-6
Ah - faster fingers!
Paulo Silva
2011-12-6
Hi Sean!
Sean de Wolski
2011-12-6
Hey Paulo, welcome back!
Paulo Silva
2011-12-6
Nice to be here again, congratulations for your new job, they couldn't choose a better man :)
Daniel
2011-12-6
OLUBUKOLA ogunsola
2016-6-5
i hope someone will still answer this after a long time. how can i achieve this without the built in function factorial, also ill like x to vary from say , 1 to 1000?
更多回答（1 个）
Image Analyst
2011-12-6
2 个投票
I think the problem is in your filename:
"imageanalystbs.m"
That sounds like a horrible name to me.
ImageAnalyst
2 个评论
Daniel
2011-12-6
Salah Saad
2015-5-5
编辑：Salah Saad
2015-5-5
he's being sarcastic...ish, it still is a weird filename
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