What is the function of find()
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Can anyone help me understanding the below code?
n_actions = find(reward(cs,:)>0);
Where 'reward' is a matrix. For example,
reward = [1 2 3; 3 4 5; 5 6 7]; cs = 1;
Thank you
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Ameer Hamza
2020년 12월 1일
편집: Ameer Hamza
2020년 12월 1일
reward = [1 2 3; 3 4 5; 5 6 7]; cs = 1;
Check the output of your code one part at a time
>> reward(cs,:)
ans =
1 2 3
The above line output cs=1 row of matrix reward. Next we use compairson operator
>> reward(cs,:)>0
ans =
1×3 logical array
1 1 1
This line find which elements are greater than 0. As you can see, all of them are above zero so we get [1 1 1]. Next
>> find(reward(cs,:)>0)
ans =
1 2 3
The find() function return the index of all elements that are non-zero.
For example,
>> find([1 2 0 1 0])
ans =
1 2 4
It shows that element number 1, 2, and 4 are non-zero.
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