How to find the second closest value to a specific value from a given matrix

I have got a 18*12*6 matrix. From this matrix i want to find out the second closest value to 1.

Answer 1

[Stephen23]

Exactly as I showed you in my comment to your earlier question:

Use sort instead of min, and pick as many as you want:

>> [v,x] = sort(abs(k(:)-1));
>> [p,n,m] = ind2sub(size(k),x(1:3)) % closest three
p =
   6
   3
   6
n =
   9
   4
   8
m =
   2
   2
   4
>> k(p(1),n(1),m(1)) % (first) closest.
ans =  0.99869
>> k(p(2),n(2),m(2)) % second closest.
ans =  0.99852
>> k(p(3),n(3),m(3)) % third closest.
ans =  0.99852

Use linear indexing to easily access the values in k, here are the closest ten values:

>> k(x(1:10))
ans =
   0.99869
   0.99852
   0.99852
   0.99852
   0.99834
   0.99816
   0.99781
   1.01296
   1.01311
   1.01327