[Octave-bug-tracker] [bug #35236] Incorrect error message when using mathematical constant e in fplot

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?35236>

                 Summary: Incorrect error message when using mathematical
constant e in fplot
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 04 Jan 2012 01:51:56 PM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Other
                  Status: None
             Assigned to: None
         Originator Name: Anders Andersson
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 3.2.4
        Operating System: GNU/Linux

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Details:

The mathematical constants e and pi are both pre-defined in Octave. However,
not to an equal degree. Compare for example


f=inline('e^x')


which defines f as a function of two variables, e and x, with


f=inline('sin(pi*x)')


which defines f as a function of only one variable, x.

Furthermore, while 


fplot('sin(pi*x)',[0,1])


works as expected,


fplot('e^x',[0,1])


gives the confusing and incorrect error message


error: `x' undefined near line XX column XX







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