I've been attempting to plot a parabola, but I keep running into an error from the "expression_comparisons.py" file as an "index out of range" error. Help? My OS is Arch Linux, using the Cinnamon DE, and version 8.1-11 of Sagemath. Attempted code:
sage: var('t') sage: parametric_plot((t,t^2),(t,-4,4))
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "_sage_input_11.py", line 10, in <module> exec compile(u'open("___code___.py","w").write("# -- coding: utf-8 --\n" + _support_.preparse_worksheet_cell(base64.b64decode("cGFyYW1ldHJpY19wbG90KCh0LHReMiksKHQsLTQsNCkp"),globals())+"\n"); execfile(os.path.abspath("___code___.py")) File "", line 1, in <module>
File "/tmp/tmpwjIIYE/___code___.py", line 3, in <module> exec compile(u'parametric_plot((t,t**_sage_const_2 ),(t,-_sage_const_4 ,_sage_const_4 )) File "", line 1, in <module>
File "/usr/lib/python2.7/site-packages/sage/misc/decorators.py", line 564, in wrapper return func(args, options) File "/usr/lib/python2.7/site-packages/sage/plot/plot.py", line 2621, in parametric_plot return plot(funcs, *args, *kwargs) File "/usr/lib/python2.7/site-packages/sage/misc/decorators.py", line 564, in wrapper return func(args, *options) File "/usr/lib/python2.7/site-packages/sage/plot/plot.py", line 1950, in plot G = _plot(funcs, args, *kwds) File "/usr/lib/python2.7/site-packages/sage/plot/plot.py", line 2067, in _plot funcs, ranges = setup_for_eval_on_grid(funcs, [xrange], options['plot_points']) File "/usr/lib/python2.7/site-packages/sage/plot/misc.py", line 150, in setup_for_eval_on_grid return fast_float(funcs, *vars,options), [tuple(range+[range_step]) for range,range_step in zip(ranges, range_steps)] File "sage/ext/fast_eval.pyx", line 1384, in sage.ext.fast_eval.fast_float (build/cythonized/sage/ext/fast_eval.c:11037) File "sage/ext/fast_eval.pyx", line 1399, in sage.ext.fast_eval.fast_float (build/cythonized/sage/ext/fast_eval.c:11258) File "sage/ext/fast_callable.pyx", line 465, in sage.ext.fast_callable.fast_callable (build/cythonized/sage/ext/fast_callable.c:4634) File "sage/symbolic/expression.pyx", line 11679, in sage.symbolic.expression.Expression._fast_callable_ (build/cythonized/sage/symbolic/expression.cpp:66334) File "/usr/lib/python2.7/site-packages/sage/symbolic/expression_conversions.py", line 1757, in fast_callable return FastCallableConverter(ex, etb)() File "/usr/lib/python2.7/site-packages/sage/symbolic/expression_conversions.py", line 218, in __call__ return self.arithmetic(ex, operator) File "/usr/lib/python2.7/site-packages/sage/symbolic/expression_conversions.py", line 1670, in arithmetic exponent = operands[1] IndexError: list index out of range
