Bump. Again, I'd be happy to open a ticket but first would like
confirmation that this is, in fact, a bug, and not desired
functionality.
- kcrisman
On Feb 17, 2:56 pm, kcrisman <kcris...@gmail.com> wrote:
> Dear Support,
>
> Viewing block matrices "nicely" seems to be difficult in Sage.
>
> sage: A=matrix([[1]])
> sage: B=matrix([[2]])
> sage: C=matrix([[3]])
> sage: D=matrix([[4]])
> sage: BM=block_matrix([A,B,C,D])
> sage: BM
>
> [1|2]
> [-+-]
> [3|4]
>
> Okay, this is fine but a little clunky. Let's try something nicer:
> sage: show(BM)
> Upon which a dvi viewer opens up, unfortunately not a very nice one...
> and shows the block matrix with only a vertical dividing line, not a
> horizontal one!
>
> Okay, let's try the notebook:
> {{{id=0|
> A=matrix([[1]])
> B=matrix([[2]])
> C=matrix([[3]])
> D=matrix([[4]])
> ///
>
> }}}
>
> {{{id=1|
> BM=block_matrix([A,B,C,D]);BM
> ///
>
> [1|2]
> [-+-]
> [3|4]}}}
>
> So far so good, but when I click "Typeset" to get a LaTeXed matrix...
>
> {{{id=1|
> BM=block_matrix([A,B,C,D]);BM
> ///
>
> <html><span class="math">\left(\begin{array}{r|r}
> 1 & 2 \\
> 3 & 4
> \end{array}\right)</span></html>
>
> }}}
>
> Which as you can see does NOT have any "blockiness" to it at all.
> Very pretty, but not a block matrix, at least not identifiably so.
>
> But is this a bug? I'm not sure, as there might be good reasons for
> these viewing options I am not aware of. If it is, I'll be happy to
> post a trac ticket.
>
> Thanks,
> - kcrisman
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