Re: Differences between graphics_toolkits, greek letters

[Andy Buckle]

On 18 January 2012 16:09, Ben Abbott <address@hidden> wrote:
> On Jan 18, 2012, at 10:03 AM, Walter White wrote:
>
>> Hello,
>>
>> I have some questions about the different graphics toolkits available in 
>> Octave
>> and hope that you can help me as I could not find any documentation on this 
>> topic.
>> (Octave 3.4.3, Windows 7)
>>
>> Which toolkit is recommended to date? Where are the main differences?
>> Is the support for gnuplot being dropped in the future?
>>
>> Which toolkit provides more possibilities, in my case primary related to 
>> printing figures to
>> files, but also other common possibilities?
>>
>> I ran the script attached below to examine the labelling of plots by gnuplot 
>> and fltk
>> and fltk does not print any greek letters. Is it possible?
>>
>> Gnuplot does not support greek letters in the legend, do you know a
>> way to achieve this?
>>
>> Kind regards,
>> Walter
>>
>> -----------------------------------
>> x = 1:10
>> y = rand(10,1)
>>
>> label_string = '\eta_{efficiency} \epsilon^{2} \lambda \lambda \circ \alpha'
>>
>> graphics_toolkit('gnuplot')
>> legend = sprintf('r-;%s;',label_string);
>> plot(x,y,legend)
>>
>> ylabel(label_string)
>> xlabel(label_string)
>> title(label_string)
>> print_filename = sprintf('./test_gnuplot.png')
>> print(print_filename, '-dpng','-FHelvetica:8','-S1024,768')
>> close all
>>
>> graphics_toolkit('fltk')
>>
>> legend = sprintf('r-;%s;',label_string);
>> plot(x,y,legend)
>>
>> ylabel(label_string)
>> xlabel(label_string)
>> title(label_string)
>> print_filename = sprintf('./test_fltk.png')
>> print(print_filename, '-dpng','-FHelvetica:8','-S1024,768')
>> close all
>
> The gnuplot toolkit is still the default.
>
> The "\circ" command is not supported by Octave. I use \circ in LaTeX quite 
> often, but is \circ a valid "TeX" command ?
>
> In any event, using the gnuplot toolkit with Octave-3.4.0 and with the 
> current developers sources, the following works for me.
>
>        x = 1:10
>        y = rand(10,1)
>        label_string = '\eta_{efficiency} \epsilon^{2} \lambda \lambda \alpha'
>        plot (x, y)
>        legend (label_string)
>        ylabel(label_string)
>        xlabel(label_string)
>        title(label_string)
>
> Something is wrong with the implementation for the syntax below.
>
>        plot (x, y, sprintf (";%s;", label_string))
>
> A bug report needs to be filed. But that will have to wait until after the 
> blackout.
>
>        https://savannah.gnu.org/bugs/?func=additem&group=octave
>
> Ben

The heading for the gnu SOPA page says DIGITAL

char(bin2dec(["01000100";"01001001";"01000111";"01001001";"01010100";"01000001";"01001100"]))'

Any particular  reason they wrote that in binary?

-- 
/* andy buckle */