How to find elements of an array by using another array elements as indices
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Hi everyone,
Let's say
A= [2 5 4 3 5 7 5 6 8 2 8 4 3 1 4];
B= [1 3 4 7];
I need to find elements of A by using elements of B as indices of elements of A. In other words, I need 1st, 3rd, 4th and 7th elements of A and information of indices is given in B. Is this possible without using for loop? If yes, how? I am glad if you can help.
2 个评论
Stanislao Pinzón
2020-5-17
You can use
A(B)
madhan ravi
2020-5-17
Stanislao I suggest you to move it as an answer since it answers the question.
采纳的回答
Ang Feng
2020-5-17
Matlab allows you to acces elements of a matrix in serveral ways. In your case, try this
A(B)
I have this results from Matalab
A(B)
ans =
2 4 3 5
, which is what you are looking for.
Other ways of indexing a matrix can be found here
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