gnuplot terminal, "postscript", is not available

[Ben Abbott]

On Mar 24, 2009, at 8:54 AM, Ben Abbott wrote:

>
> On Monday, March 23, 2009, at 09:57PM, "Ben Abbott"  
> <bpabbott at mac.com> wrote:
>>
>> On Mar 23, 2009, at 8:12 PM, Ivan Sutoris wrote:
>>
>>> On Mon, Mar 23, 2009 at 11:25 PM, Ben Abbott <bpabbott at mac.com>  
>>> wrote:
>>>>
>>>> On Mar 23, 2009, at 11:12 AM, Ben Abbott wrote:
>>>>
>>>>>
>>>>> On Monday, March 23, 2009, at 09:29AM, "Ivan Sutoris"
>>>>> <ivan.sutoris at gmail.com> wrote:
>>>>>>
>>>>>> Bug report for Octave 3.1.54+ configured for i686-pc-linux-gnu
>>>>>>
>>>>>> Description:
>>>>>> -----------
>>>>>>
>>>>>> After compiling recent tip (9006:979d0492ff40), I can't print
>>>>>> figures
>>>>>> to files (it worked with devel. version before and also in
>>>>>> 3.0.3). I
>>>>>> get "error: gnuplot_drawnow: the gnuplot terminal,  
>>>>>> "postscript", is
>>>>>> not available." I am using gnuplot 4.2 and the problem seems to
>>>>>> occur
>>>>>> in line 44 of gnuplot_drawnow.m:
>>>>>>
>>>>>> available_terminals = __gnuplot_get_var__ (plot_stream,
>>>>>> "GPVAL_TERMINALS");
>>>>>>
>>>>>> After this line, available_terminals contains NaN, so no terminal
>>>>>> is
>>>>>> recognised. Could this be caused by this version of gnuplot not
>>>>>> working corectly with __gnuplot_get_var__?
>>>>>>
>>>>>> Repeat-By:
>>>>>> ---------
>>>>>>
>>>>>> plot(randn(100,1))
>>>>>> print myfig.eps -depsc
>>>>>>
>>>>>
>>>>> Ivan,
>>>>>
>>>>> My mistake. The GPVAL_TERMINALS variable apparently is only
>>>>> available for
>>>>> gnuplot's developer's sources.
>>>>>
>>>>> I'll provide a patch later. In the meantime, you can short-circuit
>>>>> the
>>>>> check in gnuplot_drawnow by ...
>>>>>
>>>>>    plot_stream = open_gnuplot_stream (2, []);
>>>>>    available_terminals = __gnuplot_get_var__ (plot_stream,
>>>>> "GPVAL_TERMINALS");
>>>>>    available_terminals = regexp (available_terminals, "\\b\\w+\ 
>>>>> \b",
>>>>> "match");
>>>>> -     if (any (strcmpi (available_terminals, gnuplot_trim_term
>>>>> (term))))
>>>>> +     if (true)
>>>>>
>>>>> Ben
>>>>
>>>> I've pushed the patch.
>>>>
>>>> Ben
>>>
>>> With the patch it works again, thank you for quick solution :)
>>> However, when printing I get many (dozens) warnings that probably
>>> should not be there:
>>>
>>> warning: implicit conversion from real matrix to real scalar
>>>
>>> I tried to identify the problem using debug_on_warning and it seems
>>> that these occur in __go_draw_figure__.m and __go_draw_axes__.m with
>>> fprintf and fputs commands, for example line 67 in the first one:
>>>
>>> fputs (plot_stream, "\nreset;\n");
>>>
>>> Here fputs expects just one file identifier, but actually  
>>> plot_stream
>>> is two element vector and so the conversion (and warning) takes  
>>> place.
>>>
>>> Regards
>>> Ivan Sutoris
>>
>> Thanks Ivan,
>>
>> I've been intending to track down that warning, but hadn't been
>> successful.
>>
>> Ben
>>
>
> Changeset attached. I'll push it later today.
>
> Ben
>
> <changeset-plot_stream.patch>

I've pushed this change.

Ben