Arrange the array to give the added output in other array

In the following array B contains the individual results for the elements in A

Let's say,

A=[2 1 4 2 8 4 1 7 2].';

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

Now, I want A in such a way that It only contains the the unique elements in it, like final A should be:

A=[1 2 4 7 8];

And in final B it contains the total addition of the each individual values of elements in A, so final B will look like:

B=[9 14 9 5 8];

I am looking for a simple code to execute this, it is urgent

Answer 1

[Stephen23]

A = [2;1;4;2;8;4;1;7;2];
B = [1;2;3;4;5;6;7;8;9];
[X,Y,Z] = unique(A);
N = accumarray(Z,B)

N = 5×1

9 14 9 8 5

display(X)

X = 5×1

1 2 4 7 8

[SUBHO MITRA]

Thanks Stephen