Re: problem with placing legend with GNUplot

[Ben Abbott]

On May 5, 2012, at 12:24 PM, Ben Abbott wrote:

> 
> On May 5, 2012, at 12:12 PM, Karel Karlovič wrote:
> 
>> 
>> 2012/5/5 Ben Abbott <address@hidden>
>>> On May 5, 2012, at 7:50 AM, Karel Karlovič wrote:
>>> 
>>>> 2012/5/4 Ben Abbott <address@hidden>
>>>> 
>>>>> On May 4, 2012, at 12:38 AM, kovarka4 wrote:
>>>>> 
>>>>>> Wonderful!
>>>>>> 
>>>>>> I'm using fltk, but I want to use gnuplot.
>>>>>> 
>>>>>> close all
>>>>>> graphics_toolkit gnuplot  work for one time. But when I close octave and
>>>>>> open it again, there is again "fltk". Is there some possibility to change
>>>>>> graphics_toolkit to gnuplot permanently?
>>>>>> 
>>>>>> And I have some other problem. I'm using non-english symbols like á é í 
>>>>>> etc.
>>>>>> Is there some possibility to use UTF-8?
>>>>>> 
>>>>>> Thanks!
>>>>> 
>>>>> To change the default, edit your ~/.octaverc file and change the line ...
>>>>> 
>>>>>       graphics_toolkit fltk
>>>>> 
>>>>> to
>>>>> 
>>>>>       graphics_toolkit gnuplot
>>>>> 
>>>>> Regarding the non-english symbols, I tried ...
>>>>> 
>>>>>       text (0.5, 0.5, 'á é í')
>>>>> 
>>>>> and the resulted rendered as desired. If it does not for you, the problem 
>>>>> is with gnuplot and its fonts.
>>>>> 
>>>>> Ben
>>>> 
>>>> Yes, it works with the legend!
>>>> Problem  with fonts is solved (maybe with using gnuplot?).
>>>> 
>>>> 
>>>> But, when I make legend with
>>>> 
>>>> legend(labels, "location", 'northeastoutside')
>>>> legend("right")
>>>> then color lines are still inside the box with graph. See pict1.png.
>>>> 
>>>> When I make
>>>> 
>>>> legend(labels, "location", 'northeastoutside') % not legend("right")
>>>> 
>>>> color lines are outside, but text is on the border of graph. See pict2.png.
>>>> 
>>>> Do you know how to get legend with lines alltogether outside of the box 
>>>> with graph?
>>>> 
>>>> Thanks!
>>> 
>>> If you can produce a simple example so that I (or someone else) can 
>>> duplicate what you're seeing, then we can file a bug report and provide a 
>>> work around for you.
>>> 
>>> Running the developers sources for Octave 3.6.x,  and with either the 
>>> gnuplot and fltk graphics toolkits, the following works for me (the legend 
>>> and plot box do not overlap)
>>> 
>>>       clf
>>>       plot(1:10, 1:10);
>>>       title("a very long label can sometimes cause problems");
>>>       legend({"hello world"}, "location", "northeastoutside");
>>> 
>>> If I add ...
>>> 
>>>       legend right
>>> 
>>> There is still no overlap between the legend and plot box.
>>> 
>>> Ben
>> 
>> OK, I made this also
>> 
>> clf
>>        plot(1:10, 1:10);
>>        title("a very long label can sometimes cause problems");
>>        legend({"hello world"}, "location", "northeastoutside");
>>        legend("right");
>>        print('-dpng','example.png');
>> 
>> and the result image stil has a line inside the graph box, part is over the 
>> box...see example.png
>> 
>> And to my script...
>> 
>> format long g
>> 
>> vstup = [ 0.00500     0.02000    -0.02700     1.00000;
>>    -0.00100     0.01000     0.03000     2.00000;
>>     0.00500     0.00100    -0.00200     3.00000;
>>     0.00400     0.00100     0.00100     4.00000;
>>     0.00400     0.00000    -0.00100     5.00000;
>>     0.00500     0.00300     0.00200     6.00000;
>>     0.00600     0.00000     0.00300     7.00000;
>>     0.00400    -0.00100     0.00300     8.00000;
>>     0.00500    -0.00100     0.00100     9.00000;
>>     0.00700    -0.00100     0.00100    10.00000;
>>     0.01200     0.00900     0.00800    11.00000;
>>     0.00000    -0.00800     0.00100    12.00000;
>>    -0.00300    -0.01100    -0.00300    13.00000;
>>    -0.00400    -0.01800    -0.00900    14.00000;
>>    -0.00100    -0.00600     0.00000    15.00000;
>>    -0.00200    -0.01200     0.00200    16.00000;
>>     0.00600    -0.00100     0.00700    17.00000;
>>    -0.00300    -0.00900    -0.00900    18.00000;
>>     0.01200     0.01300     0.00800    19.00000;
>>     0.00000    -0.00600     0.00000    20.00000;
>>    -0.00100    -0.01100    -0.00200    21.00000;
>>     0.00600    -0.00100     0.00500    22.00000;
>>     0.00100    -0.00600     0.00400    23.00000;
>>    -0.00300    -0.00800     0.00800    24.00000;
>>     0.00400     0.00200     0.00800    25.00000];
>> 
>> % globalni prumery
>> plat = [744958.652      1040903.756 258.727]; % A
>> %%%%%%%%%%%%%%%%%%%%%
>> % C O M P U T I N G %
>> %%%%%%%%%%%%%%%%%%%%%
>> # aa = [0,interval(1,1),interval(2,1),ii];  % hodnota, kde ma byt umisten 
>> popisek
>> # bb = [cas00;cas20;cas40;cas60]; % popisek na miste hodnoty aa
>> ii=rows(vstup);
>> interval = [ii/3,2*ii/3];
>> figure(1)
>> hold on
>> title("Odchylka souřadnice X [m] od globálního průměru polohy pilíře")
>> xlabel('jednotlivé body reprezentují čas záznamu po 15 sec')
>> ylabel('odchylka od průměru [m]')
>> plot([ii,0], [0,0],'-g') 
>> plot(vstup(1:7,4),vstup(1:7,1),'-r',vstup(8:16,4),vstup(8:16,1),'-b',vstup(17:end,4),vstup(17:end,1),'-c')
>> axis([00,ii,-0.02,0.02])
>> labels={'globální průměr','CZEPOS','Trimble VRS Now','TopNET'};
>> legend(labels, "location", 'northeastoutside')
>> print('example2.png','-dpng');
>> hold off
>> pause
>> 
>> 
>> When I don't write
>> 
>> legend("right");
>> 
>> it is prety good. But the no-english symbols are bad (see in the script and 
>> on the image "example2.png").
>> 
>> I'm so sorry, if everything is my stupid mistake.
>> 
>> Karel
> 
> Ok. Thanks.
> 
> This definitely is not working correctly. I'll try to track down the problem.
> 
> Ben

I did some experimenting, constructed a illustrative example, and entered a bug 
report.

        https://savannah.gnu.org/bugs/index.php?36408

To work around this problem, you'll need to output the gnuplot stream, edit it, 
and then process it through gnuplot again.

First, after producing the plot in Octave, type the following to save the 
gnuplot commands in "debug.gp"

        drawnow ("png", "example2.png", false, "debug.gp")

Next edit "debug.gp" and modify the line begining with "set rmargin". The value 
may initially be negative, You'll need to experiment, but using 0.7 should give 
a reasonable result.

        set rmargin screen 0.70;

Save "debug.gp" and run gnuplot. From the gnuplot command prompt, type ....

        load "debug.gp"

This will produce a new "example2.png"

Ben