How to code below mathematical formula?

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Hassan Ashraf
Hassan Ashraf 2019-7-3
编辑： KALYAN ACHARJYA 2019-7-3
I want to implement a below mathematical function in MATLAB, can anyone help me out?
myop.png

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采纳的回答

Stephen23
Stephen23 2019-7-3
编辑：Stephen23 2019-7-3
The simple MATLAB solution:
>> x = 1:30;
>> t = 23; % threshold
>> MYOP = sum(x>=t)/numel(x)
MYOP =
0.26667

更多回答（1 个）

KALYAN ACHARJYA
KALYAN ACHARJYA 2019-7-3
编辑：KALYAN ACHARJYA 2019-7-3
x= %define x value range
n= %define n
threshold= %define threshold value
fx=x;
idx1=find(fx>=threshold);
fx(idx)=1;
idx1=find(fx<threshold);
fx(idx)=0;
MYOP=(sum(fx(1:n)))/n;
  2 个评论
Stephen23
Stephen23 2019-7-3
编辑：Stephen23 2019-7-3
Note that this answer does not implement the formula given in the question.
In particular it does not include f(x) in any way within the sum, as the question indicates. It also does not vectorize the generation of fx (or use a loop), so it is unlikely to be a useful approach anyway.
The code throws an error when run because xi is not defined:
Undefined function 'xi' for input arguments of type 'double'.

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