[Octave-bug-tracker] [bug #62451] xlim([]) gives irritating error message

[Hartmut]

URL:
  <https://savannah.gnu.org/bugs/?62451>

                 Summary: xlim([]) gives irritating error message
                 Project: GNU Octave
            Submitted by: hardy
            Submitted on: Fri 13 May 2022 09:51:52 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 7.1.0
         Discussion Lock: Any
        Operating System: Any

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Details:

The following code

plot(1:10)
xlim([])


gives an irritating error message under Octave (7.1):

error: arg(1): out of bound 0 (dimensions are 0x0) (note: variable 'arg'
shadows function)
error: called from
    __axis_limits__ at line 54 column 22
    xlim at line 60 column 7


In Matlab this code also throws an error message, but it's much easier to
understand:

Error using xlim (line 31)
Limits must be a 2-element vector of increasing numeric values.


Could we improve our error message in xlim, in order to not confuse users in
this case?





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