Can't get plotting to work

edit

Downloaded sage-6.3-x86_64-Linux-Ubuntu_10.04_x86_64.tar.gz, expanded the archive file onto my Linux Mint 15 system.

I ran sage simply by typing: ./sage from the command line.

I then type the command: notebook() at the sage prompt to try out some simple plotting features. I get the following output from the command:

The notebook files are stored in: sage_notebook.sagenb
┌────────────────────────────────────────────────┐
│                                                │
│ Open your web browser to http://localhost:8080 │
│                                                │
└────────────────────────────────────────────────┘

Executing twistd  --pidfile="sage_notebook.sagenb/sagenb.pid" -ny "sage_notebook.sagenb/twistedconf.tac"
/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/Crypto/Util/number.py:57: PowmInsecureWarning: Not using mpz_powm_sec.  You should rebuild using libgmp >= 5 to avoid timing attack vulnerability.
  _warn("Not using mpz_powm_sec.  You should rebuild using libgmp >= 5 to avoid timing attack vulnerability.", PowmInsecureWarning)
2014-09-25 22:32:31-0400 [-] Log opened.
2014-09-25 22:32:31-0400 [-] twistd 13.2.0 (/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/bin/python 2.7.8) starting up.
2014-09-25 22:32:31-0400 [-] reactor class: twisted.internet.epollreactor.EPollReactor.
2014-09-25 22:32:31-0400 [-] QuietSite starting on 8080
2014-09-25 22:32:31-0400 [-] Starting factory <__builtin__.QuietSite instance at 0x7f19fc981fc8>

The browser window opens up, pointed to http://localhost:8080/home/admin/2/. I then created a worksheet and entered the following command:

circle((0,0), 1, rgbcolor=(1,1,0))

This results in the following traceback, and I cannot get any of the simple plots in the tutorial to display anything. Thanks for any help...

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "_sage_input_2.py", line 10, in <module>
    exec compile(u'open("___code___.py","w").write("# -*- coding: utf-8 -*-\\n" + _support_.preparse_worksheet_cell(base64.b64decode("Y2lyY2xlKCgwLDApLCAxLCByZ2Jjb2xvcj0oMSwxLDApKQ=="),globals())+"\\n"); execfile(os.path.abspath("___code___.py"))
  File "", line 1, in <module>

  File "/tmp/tmpJWsQ0O/___code___.py", line 3, in <module>
    exec compile(u'circle((_sage_const_0 ,_sage_const_0 ), _sage_const_1 , rgbcolor=(_sage_const_1 ,_sage_const_1 ,_sage_const_0 ))
  File "", line 1, in <module>

  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/misc/displayhook.py", line 459, in __call__
    if self.try_format_graphics(obj):
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/misc/displayhook.py", line 417, in try_format_graphics
    return obj._graphics_()
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.py", line 824, in _graphics_
    self.show()
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/misc/decorators.py", line 471, in wrapper
    return func(*args, **kwds)
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.py", line 1818, in show
    self.save(filename, **kwds)
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/misc/decorators.py", line 471, in wrapper
    return func(*args, **kwds)
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/sage/plot/graphics.py", line 2895, in save
    from matplotlib import rcParams
  File "/home/rick/install.dsk/Sage/sage-6.3-x86_64-Linux/local/lib/python2.7/site-packages/matplotlib-1 ...