using summation within a function

1 次查看（过去 30 天）
Giuseppe Battaglia
Giuseppe Battaglia 2016-3-13
评论： Walter Roberson 2021-7-11
I'm trying to compute something like this:
x=1:100
n=1:10
y=sum(x+n) (or any other f(x))
This only works if n and x have the same dimension as matrix, but what I'm after is to use to derive y =f(x) but so far I had no luck any help is wellcome
thanks
  1 个评论
Walter Roberson
Walter Roberson 2016-3-13
In a case like that, what size would you want y to come out as, and what values?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Dave Behera
Dave Behera 2016-3-24
The x + n part will only work if they are the same dimension. Can you please describe in detail what you are referring to as 'derive y =f(x)'?
  2 个评论
Sa'adatu Abubakar
Sa'adatu Abubakar 2021-7-10
I want to use the summation function inside the newtonRaphson algorithm, how can I express it I used symsum(f,k,a,b) but it dosnt work. Do I need to use for loop?
Walter Roberson
Walter Roberson 2021-7-11
sum(arrayfun(@f, a:b))
If f returns a non-scalar value then you might need
temp = arrayfun(@f, a:b, 'uniform', 0);
nd = ndims(temp{1});
y = sum(cat(nd+1, temp{:}),nd+1);

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Mathematics 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by