How to find location of elements in an array

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I have 2 vectors 'A' of size 41*1 and 'B' of size 14*1
vector 'B' contains selected elements from vector 'A'. how do I find the position of elements present in vector 'b' in vector 'a'?
Example: A=1:1:100
B=2:2:20
Now I want to find the position of elements of B in A.
I tried find function but it throws dimention error.
Thanks in Advance

回答(2 个)

KALYAN ACHARJYA
KALYAN ACHARJYA 2020-7-5
编辑:KALYAN ACHARJYA 2020-7-5
idx=find(ismember(A,B))
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Kanupriya Singh
Kanupriya Singh 2020-7-5
Try this-
a = [2 1 3 4 6 8]
b = [2 6 8]
idx = [];
for i = 1:length(b)
idx = [idx, find(b(i) == a)];
end
  2 个评论
Stephen23
Stephen23 2020-7-5
Rather complex... one ismember call is much simpler (and is what most MATLAB users would do).
Praanesh Sambath
Praanesh Sambath 2020-7-5
I get this error
error: horizontal dimensions mismatch (0x2 vs 1x1)
>> idx
idx = [](0x2)

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