On Sep 27, 5:55 am, louie <louferville...@hotmail.com> wrote:
> 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?
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
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