Thanks for your reply. I am using the computer in my office and not sure if 
there is anything I can do to write permissions. If so, could you give some 
detailed advice (I am new to mac)? Thank you!



On Tuesday, October 16, 2012 12:15:00 PM UTC-4, Volker Braun wrote:
>
> Well the obvious question is: do you have write permissions 
> to /Network/Servers/
> smb-files.math.uwaterloo.ca/cifs.homedir/MacProfile/.sage//matplotlib-1.1.0
>  
>
>
>
>
>
>
> On Tuesday, October 16, 2012 4:25:22 PM UTC+1, fomalhauty wrote:
>>
>> Hi there,
>>
>> I am learning Sage recently and when I was trying to display a complete 
>> graph in the terminal window it showed the following:
>>
>>
>> sage: K=graphs.CompleteGraph(2)
>> sage: K.show()
>>
>> ---------------------------------------------------------------------------
>> RuntimeError                              Traceback (most recent call 
>> last)
>>
>> /Network/Servers/smb-files.math.uwaterloo.ca/cifs.homedir/MacProfile/<ipython
>>  
>> console> in <module>()
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/graphs/generic_graph.pyc
>>  
>> in show(self, **kwds)
>>   14574             if kwds.has_key(kwd):
>>   14575                 plot_kwds[kwd] = kwds.pop(kwd)
>> > 14576         self.plot(**plot_kwds).show(**kwds)
>>   14577 
>>   14578     def plot3d(self, bgcolor=(1,1,1), vertex_colors=None, 
>> vertex_size=0.06,
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
>>  
>> in wrapper(*args, **kwds)
>>     454             kwds[self.name + "options"] = suboptions
>>     455 
>> --> 456             return func(*args, **kwds)
>>     457 
>>     458         #Add the options specified by @options to the signature 
>> of the wrapped
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
>>  
>> in show(self, **kwds)
>>    1719         else:
>>    1720             kwds.setdefault('filename', 
>> sage.misc.misc.tmp_filename() + '.png')
>> -> 1721             self.save(**kwds)
>>    1722             os.system('%s %s 2>/dev/null 1>/dev/null &'
>>    1723                       % (sage.misc.viewer.browser(), 
>> kwds['filename']))
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc
>>  
>> in wrapper(*args, **kwds)
>>     454             kwds[self.name + "options"] = suboptions
>>     455 
>> --> 456             return func(*args, **kwds)
>>     457 
>>     458         #Add the options specified by @options to the signature 
>> of the wrapped
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
>>  
>> in save(self, filename, **kwds)
>>    2549             SageObject.save(self, filename)
>>    2550         else:
>> -> 2551             figure = self.matplotlib(**options)
>>    2552             # You can output in PNG, PS, EPS, PDF, or SVG format, 
>> depending
>>    2553             # on the file extension.
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/graphics.pyc
>>  
>> in matplotlib(self, filename, xmin, xmax, ymin, ymax, figsize, figure, sub, 
>> axes, axes_labels, fontsize, frame, verify, aspect_ratio, gridlines, 
>> gridlinesstyle, vgridlinesstyle, hgridlinesstyle, show_legend, 
>> legend_options, axes_pad, ticks_integer, tick_formatter, ticks, base, scale)
>>    2070             axes = self._show_axes
>>    2071 
>> -> 2072         from matplotlib.figure import Figure
>>    2073         from matplotlib import rcParams
>>    2074         self.fontsize(fontsize)
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/matplotlib/__init__.py
>>  
>> in <module>()
>>     769 
>>     770 # this is the instance used by the matplotlib classes
>> --> 771 rcParams = rc_params()
>>     772 
>>     773 if rcParams['examples.directory']:
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/matplotlib/__init__.py
>>  
>> in rc_params(fail_on_error)
>>     687     'Return the default params updated from the values in the rc 
>> file'
>>     688 
>> --> 689     fname = matplotlib_fname()
>>     690     if not os.path.exists(fname):
>>     691         # this should never happen, default in mpl-data should 
>> always be found
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/matplotlib/__init__.py
>>  
>> in matplotlib_fname()
>>     599                 return fname
>>     600 
>> --> 601     fname = os.path.join(get_configdir(), 'matplotlibrc')
>>     602     if os.path.exists(fname): return fname
>>     603 
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/matplotlib/__init__.py
>>  
>> in wrapper(*args, **kwargs)
>>     244         assert callable(func)
>>     245         def wrapper(*args, **kwargs):
>> --> 246             ret = func(*args, **kwargs)
>>     247 
>>     248             if (always or not wrapper._spoke):
>>
>> /Applications/Sage-5.2-OSX-64bit-10.6.app/Contents/Resources/sage/local/lib/python2.7/site-packages/matplotlib/__init__.py
>>  
>> in _get_configdir()
>>     458             os.makedirs(configdir)
>>     459         if not _is_writable_dir(configdir):
>> --> 460             raise RuntimeError('Could not write to 
>> MPLCONFIGDIR="%s"'%configdir)
>>     461         return configdir
>>     462 
>>
>> RuntimeError: Could not write to MPLCONFIGDIR="/Network/Servers/
>> smb-files.math.uwaterloo.ca/cifs.homedir/MacProfile/.sage//matplotlib-1.1.0
>> "
>> sage: 
>>
>>
>> Could anyone explain what was going on?  Thanks a lot!
>>
>>

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