Symbolic Matrix as a Latex Object

[louie]

Hello, my platform is:
- W. Vista 64
- Firefox 3.0.10
- Sage Version 4.1.1 (VMWare)

Last night I tried this Matlab exercise in the notebook (without
Typeset activated):

x,y,z,a,b,c=var('x,y,z,a,b,c')
A=matrix(SR,[[a,b,1],[0,1,c],[x,0,0]]);A
[a b 1]
[0 1 c]
[x 0 0]

type(A)
<type 'sage.matrix.matrix_symbolic_dense.Matrix_symbolic_dense'>

So far, so good, but with Typeset activated:

type(A)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/notebook/sage_notebook/worksheets/admin/3/code/12.py",
line 6, in <module>
type(A)
File "", line 1, in <module>

File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/
latex.py", line 1768, in pretty_print
view(object)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/
latex.py", line 1512, in view
s = _latex_file_(objects, title=title, sep=sep, tiny=tiny,
debug=debug, **latex_options)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/
latex.py", line 1180, in _latex_file_
L = latex(x)
File "/usr/local/sage/local/lib/python2.6/site-packages/sage/misc/
latex.py", line 580, in __call__
return LatexExpr(x._latex_())
TypeError: descriptor '_latex_' of 'sage.matrix.matrix0.Matrix' object
needs an argument

Is this behaviour normal?

--Luis V.--

[John H Palmieri]

No, it's a bug. Note that when you execute "type(A)", you're not
asking for the matrix to be typeset, but for its type to be typeset.
With the typeset box checked, executing "A" should produce a nice
version of the matrix.

For some reason, typesetting "types" is not working well.

John

[John H Palmieri]

On Sep 27, 3:57 pm, John H Palmieri <jhpalmier...@gmail.com> wrote:
> On Sep 27, 5:55 am, louie <louferville...@hotmail.com> wrote:

[snip]

> > Is this behaviour normal?
>
> No, it's a bug.  Note that when you execute "type(A)", you're not
> asking for the matrix to be typeset, but for its type to be typeset.
> With the typeset box checked, executing "A" should produce a nice
> version of the matrix.
>
> For some reason, typesetting "types" is not working well.

There is a patch available at

<http://trac.sagemath.org/sage_trac/ticket/7051>

Cheers,
John