How to use the index of a matrix using Unique function to alter a second matrix?

Question

James McGinley 2019-10-1

关闭： MATLAB Answer Bot 2021-8-20

Say I am looking at 1 row of two matrices

A = [ 2 5 9 3 5 ]

B = [ 1 13 2 8 7]

Using the unique function on A, how would i use the index to rearrange B to match A. Example A1 = B1 , A2 = B2, ...

If i use

[value, indx] = unique(A);

I should get an output of [2 3 5 9] ... how do I apply the index to make B = [ 1, 8, 13, 2] (keeping the matrix values matching)

此问题已关闭。

Answer 1

KALYAN ACHARJYA 2019-10-1

编辑：KALYAN ACHARJYA 2019-10-1

how do I apply the index to make B = [ 1, 8, 13, 2]

>> B=B(indx)
B =
     1     8    13     2

Code:

A = [ 2 5 9 3 5 ];
B = [ 1 13 2 8 7];
[value, indx]= unique(A);
B=B(indx)