How to Generate this Function?

2018 1 5
1 个回答
更新时间：2018 1 6
1 次查看（30 天）

0 个投票

if
input_x={1/6,1/6,1/6,1/6,1/6,1/6}
How can I generate this function:
i=1:6
pi_all(i)=(1-(i-1)/5)*(0.45+1.1*(input_x(i)/2 +sum(input_x(i:i-1))))

6 个评论
显示 4更早的评论 隐藏 4更早的评论

Walter Roberson
Walter Roberson 2018-1-5
Are you looking for a way to vectorize the expression?
Note that i:i-1 is empty in MATLAB.
Torsten
Torsten 2018-1-5
In sum(...), you refer to input_x(1:0). But input_x(0) does not exist in MATLAB language.
Best wishes
Torsten.
pervesh anthwal
pervesh anthwal 2018-1-5
then how can I write summation input_x(j) for j<i for this equation
Torsten
Torsten 2018-1-5
Which elements of input_x do you want to sum if you write
sum(input_x(i:i-1))
?
Best wishes
Torsten.
Walter Roberson
Walter Roberson 2018-1-5
Torsten:
1:0 is not the same as [1, 0]. 1:0 is empty, so input_x(1:0) is the empty vector.
Walter Roberson
Walter Roberson 2018-1-5
Why are you not using a loop and
sum(input_x(1:i-1))

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

pervesh anthwal
pervesh anthwal 2018-1-6
编辑：Walter Roberson 2018-1-6

0 个投票

https://in.mathworks.com/matlabcentral/answers/375711-how-to-generate-this-function#comment_521727
what I want to do is:
for i=1
pi_all(i)=(1-(1-1)/5)*(0.45+1.1*(input_x(1)/2))
In this expression I want sum term to be 0 as i!=0
for i=2
pi_all(2)=(1-(2-1)/5)*(0.45+1.1*(input_x(2)/2 +sum(input_x(2:2-1))))
In here sum will take only input_x(1)
for i=3
pi_all(i)=(1-(3-1)/5)*(0.45+1.1*(input_x(3)/2 +sum(input_x(3:3-1))))
In here sum will take input_x(1)+input_x(2)
and so on.

类别

在 帮助中心 和 File Exchange 中查找有关 Loops and Conditional Statements 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