Inconsistent behaviour of (:)

[Thomas Weber]

Hello, 

I just noticed something which I am not sure about wether it's a bug or
not:

octave:1> e1 = [1,0]
e1 =

  1  0

octave:2> acos(e1)(:)
ans =

  0.00000  1.57080

octave:3> cos(e1)(:)
ans =

  0.54030
  1.00000

Why does the acos command return a row-vector? 
b = acos(e1);
b(:)
returns a column vector (as I expected).

Am I doing something wrong?

Regards 
Thomas



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