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I get a similar error, when running the command
plot(x^2+1,(x,-1,1))
inside a terminal session.
For instance:
plot(x^2+1,(x,-1,))
TypeError Traceback (most recent call last) <ipython-input-1-8ef1c67ac85a> in <module>() ----> 1 plot(x**Integer(2)+Integer(1),(x,-Integer(1),))
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc in wrapper(args, *kwds) 565 options['__original_opts'] = kwds 566 options.update(kwds) --> 567 return func(args, *options) 568 569 #Add the options specified by @options to the signature of the wrapped
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/plot.pyc in plot(funcs, args, *kwds) 1939 1940 if hasattr(funcs, 'plot'): -> 1941 G = funcs.plot(args, *original_opts) 1942 1943 # If we have extra keywords already set, then update them
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/symbolic/expression.pyx in sage.symbolic.expression.Expression.plot (build/cythonized/sage/symbolic/expression.cpp:68738)() 12030 except NotImplementedError: 12031 return self.function(param)
12032 return plot(f, args, *kwds) 12033 12034 def _plot_fast_callable(self, *vars):
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/misc/decorators.pyc in wrapper(args, *kwds) 565 options['__original_opts'] = kwds 566 options.update(kwds) --> 567 return func(args, *options) 568 569 #Add the options specified by @options to the signature of the wrapped
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/plot.pyc in plot(funcs, args, *kwds) 1958 # if there is one extra arg, then it had better be a tuple 1959 elif n == 1: -> 1960 G = _plot(funcs, args, *kwds) 1961 elif n == 2: 1962 # if there are two extra args, then pull them out and pass them as a tuple
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/plot.pyc in _plot(funcs, xrange, parametric, polar, fill, label, randomize, **options) 2075 orig_funcs = funcs # keep the original functions (for use in legend labels) 2076 excluded_points = [] -> 2077 funcs, ranges = setup_for_eval_on_grid(funcs, [xrange], options['plot_points']) 2078 xmin, xmax, delta = ranges[0] 2079 xrange=ranges[0][:2]
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/plot/misc.pyc in setup_for_eval_on_grid(funcs, ranges, plot_points, return_vars) 119 vars += ('_',)*(nargs-len(vars)) 120 --> 121 ranges = [[float(z) for z in r] for r in ranges] 122 123 if plot_points is None:
/Applications/SageMath-8.3.app/Contents/Resources/sage/local/lib/python2.7/site-packages/sage/symbolic/expression.pyx in sage.symbolic.expression.Expression.__float__ (build/cythonized/sage/symbolic/expression.cpp:11836)() 1426 raise 1427 except TypeError: -> 1428 raise TypeError("unable to simplify to float approximation") 1429 return ret 1430
TypeError: unable to simplify to float approximation
