Simple Question: Taking Some Elements of Variables Based on Number

Bx is an array. Size is 6x1.

When I want two rows of members from that, it gives me as it should. If I ask only one row, it gives as second one. Isn't that wrong? Am I doing something wrong? Since I have based my code to the first type, due to second type of output I got errors

K>> B_x([1 2;3 4])
ans =
   -25   -24
   -23   -22
K>> B_x([1 2])
ans =
   -25
   -24

[Tommy]

When you call B_x([1 2]), even though the indices are a row vector, you get a column vector because B_x is a column vector.

[Berk Demir]

That's OK. But why I get 25 and 24 as row vector in the first instance? In my mind it is just one less row in the second instance. The same type answer should be given to me.