How to campare index number of a matrix with other

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AS
AS 2019-4-15
评论： AS 2019-4-15
I have two array. A=[ 9 8 5 4 4 10] and B=[1 1 1 3 3 3 2 2 1 1]. Now, I want to campare A and B. The index number of each element in matrix B is same in matrix A. I want to represent the matrix A by the value of matrix B as its index number is same with. Now I want to represent matrix A as like B i.e. A will be A=[1 2 3 3 3 1]. How will write it code.

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采纳的回答

Raj
Raj 2019-4-15
for i=1:numel(A)
A(i)=B(A(i));
end
Also please see this.
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Stephen23
Stephen23 2019-4-15
编辑：Stephen23 2019-4-15
"...the 'for loop' code gives a better understanding of what is happening in the background.
I disagree: MATLAB is a high-level language and array indexing is one of its most powerful features. Learning how to use array indexing is not more complex than a loop: Riks solution is simpler than this answer and more efficient.
Array indexing is required for any user who wants to learn how to use MATLAB effectively.

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更多回答（1 个）

Rik
Rik 2019-4-15
A=[ 9 8 5 4 4 10];
B=[1 1 1 3 3 3 2 2 1 1];
newA=B(A);

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