what is wrong with the following:
sage: v1 = vector([1,2])
sage: v2 = vector([2,1])
sage: p1 = plot(v1, rgbcolor=(1,0,0))
sage: p2 = plot(v2, rgbcolor=(0,1,0))
sage: t1 = text("V1", (1,2.1), rgbcolor=(1,0,0))
sage: t2 = text("V2", (2,1.1), rgbcolor=(0,1,0))
sage: p3 = plot(v1 + v2, rgbcolor=(0,0,1))
sage: t3 = text("V1 + V2", v1+v2 + vector([0,0.1]), rgbcolor=(0,0,1))
sage: p4 = plot(vector([3,3]), rgbcolor=(1,1,1), linestyle='--')
sage: show(p1 + p2 + p3 + p4 + t1 + t2 + t3, xmin=-0.5, xmax=3.5,
ymin=-0.5, ymax=3.5)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/cesarnda/.sage/sage_notebook/worksheets/admin/9/code/
120.py", line 7, in <module>
show(p1 + p2 + p3 + p4 + t1 + t2 + t3, xmin=-_sage_const_0p5 ,
xmax=_sage_const_3p5 , ymin=-_sage_const_0p5 , ymax=_sage_const_3p5 )
File "", line 1, in <module>
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/sage/misc/functional.py", line 952, in show
return x.show(*args, **kwds)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/sage/plot/plot.py", line 1302, in show
hgridlinesstyle=hgridlinesstyle)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/sage/plot/plot.py", line 1627, in save
canvas.print_figure(filename, dpi=dpi)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/backend_bases.py", line 1453, in print_figure
**kwargs)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/backends/backend_agg.py", line 326, in print_png
FigureCanvasAgg.draw(self)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/backends/backend_agg.py", line 282, in draw
self.figure.draw(self.renderer)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/figure.py", line 773, in draw
for a in self.axes: a.draw(renderer)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/axes.py", line 1668, in draw
a.draw(renderer)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/patches.py", line 3588, in draw
gc.set_linestyle(self._linestyle)
File "/Users/cesarnda/Software/sage/local/lib/python2.6/site-
packages/matplotlib/backend_bases.py", line 650, in set_linestyle
raise ValueError('Unrecognized linestyle: %s' % style)
ValueError: Unrecognized linestyle: --
Why does it say that the linestyle='--' is not recognized?
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