Mapping elements of a matrix using a vector array

Question

AP 2014-5-21

1
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https://ww2.mathworks.cn/matlabcentral/answers/130548-mapping-elements-of-a-matrix-using-a-vector-array

评论： Javier 2017-5-24

I have a matrix named A with size N×3. The values of the elements of A ranges from 1 to M. For example, A with size 8×3:

A = [ 1     2     3;
   4     5;
   6     7;
   3     4;
   6     7;
   4     7;
   3     2;
   8     9]

B is a vector array whose elements are the values of element of A. In the example above, B with size 9×1:

B = [1 2 3 4 5 6 7 8 9]

I have another vector array named C with the size of B with which I want to replace element of B in A. In fact, C represents whether the elements of B in A has repeated more than for example 2. In my example, C with size 9×1:

C = [0 0 0 0 0 0 0 1 1]

Here is the expected result, where the elements 1 to 7 are replaced by 0 and 8 and 9 are replaced by 1:

Anew = [ 0     0     0
         0     0     0
         0     0     0
         0     0     0
         0     0     0
         0     0     0
         0     0     0
         0     1     1]

How can I replace the elements of B in A with its corresponding values using C? Thank you.