Find the index of a value closest to a constant value in 3D array when the index of row and column are given

I have a 3D array B(i,j,k). and I want to locate the index (k) in the array closest to the a number Val = 6.

i = 1, j = 4. and the matrix is given as B(1,4,:)

The array is given by:

B(:,:,1) =

1 2 4 2

7 8 9 0

B(:,:,2) =

9 2 4 7

0 1 2 3

B(:,:,3) =

7 8 9 0

1 7 6 8

The value closest to 6 is 7 and the index is 2.

Please, how can I write the code to compute this task.

Answer 1

[Chunru]

B(:,:,1) =[ 1     2     4     2
            7     8     9     0];
B(:,:,2) =[ 9     2     4     7
            0     1     2     3];
B(:,:,3) =[ 7     8     9     0
            1     7     6     8];
i = 1; j = 4;
[~, k] = min(abs(B(i,j,:)-6))

k = 2