how to make a Series?
50 次查看(过去 30 天)
显示 更早的评论
Hello, I am trying to create a series like this:
X(n)=-(sqrt(n)-Sqrt(n-1))x(1)-(sqrt(n-1)-sqrt(n-2))x(2)-(sqrt(n-2)-sqrt(n-3))x(3)+......+1/(1+exp(-an))
So, if n=1:
x(1)=1/(1+exp(-a))
if n=2:
x(2)=-(sqrt(2)-1)x(1)+1/(1+exp(-2a))
and so on. I have never worked with series at MATLAB. I can find any way to create the series, however, i am wondering if there are some specific rule.
Thanks a lot.
0 个评论
采纳的回答
Roger Stafford
2015-4-10
x = zeros(N,1);
for n = 1:N
x(n) = sum(-(sqrt(n:-1:2)-sqrt(n-1:-1:1)).*x(1:n-1))+1/(+exp(-a*n));
end
2 个评论
Roger Stafford
2015-4-10
It would save excessive square roots to write
x = zeros(N,1);
s = sqrt(1:N);
for n = 1:N
x(n) = sum((s(n-1:-1:1)-s(n:-1:2)).*x(1:n-1))+1/(+exp(-a*n));
end
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Time Series 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!