Access elements of a Vector without a few Indices?

Say suppose I have a vector

X = [4 5 1 7 3 9 2 4]

and I want to access X but without indices: 1, 4 and 6. I tried

X(~[1, 4, 6])

But that's not working. Any suggestions.

Thanks

PS: I don't want to modify the vector.

Answer 1

[Stephen23]

You could use setxor to generate the indices:

>> X = [4 5 1 7 3 9 2 4];
>> X(setxor(1:numel(X),[1,4,6]))
ans =
   5     1     3     2     4

Or alternatively you could use create a logical array and use logical indexing. Even though it takes more lines it may be faster than the first solution:

>> Y = true(size(X));
>> Y([1,4,6]) = false;
>> X(Y)
ans =
   5     1     3     2     4

[Pankaj]

Thanks Stephen