Illustration of Empty vectors:
The Empty vectors can also be used to delete elements from the arrays. For illustration, to remove the third element from array, an empty vector is assigned to it:
>> vec = 1:5
vec =
1 2 3 4 5
>> vec(3) = []
vec =
1 2 4 5
The elements in vector are now numbered 1 through 4.
The Subsets of a vector could also be eliminated; for illustration:
>> vec = 1:8
vec =
1 2 3 4 5 6 7 8
>> vec(2:4) = []
vec =
1 5 6 7 8