Complement subset in Matlab [duplicate]

Answer 1

I don't think there is an elegant way, but a more performant might be

v = rand(1,10);
sel = true(1, numel(v));
sel( 4:5 ) = false;
v = v( sel );

Answer 2

An alternative is to simply remove the elements from the array:

u = v;
u(4:5) = [];

I'm using a temporary variable since I don't know if it's acceptable to modify the original array v or not.