May 30, 2008
3:08 a.m.
On Thu, May 29, 2008 at 6:32 PM, Alan G Isaac <aisaac@american.edu> wrote:
On Thu, 29 May 2008, Keith Goodman apparently wrote:
a[[0,1]] That one looks odd. But it is just shorthand for: a[[0,1],:]
Do you mean that ``a[[0,1],:]`` is a more primitive expression than ``a[[0,1]]``? In what sense, and does it ever matter?
Is ``a[[0,1]]`` completely equivalent to ``a[[0,1],...]`` and ``a[[0,1],:]``?
I can see how the difference between a[0,1] a[[0,1]] is not obvious at first, especially if you come from octave/matlab. The first example has an obvious i and j. But the second example doesn't. So I tried to point out that i=[0,1] and j=:.