Re: help with legend

[Valmor de Almeida]

On 01/17/2012 10:49 AM, Ben Abbott wrote:
> On Jan 17, 2012, at 10:20 AM, Valmor de Almeida wrote:
> 
>> On 01/16/2012 08:24 AM, Ben Abbott wrote:
>>
>>> On Jan 15, 2012, at 9:58 PM, Valmor de Almeida wrote:
>>>
>>>> On 01/15/2012 08:10 PM, Ben Abbott wrote:
>>>>>
>>>>> On Jan 15, 2012, at 2:35 PM, Ben Abbott wrote:
>>>>>
>>>>>> On Jan 15, 2012, at 12:48 PM, Valmor de Almeida wrote:
>>>>>>
>>>>>>> Hello,
>>>>>>>
>>>>>>> I am trying to customize legends on a plotyy axes/lines but I am not
>>>>>>> able to. Here are the commands:
>>>>>>>
>>>>>>> [ax, h1, h2] = plotyy(x1,y1, x2,y2, @plot, @plot);
>>>>>>>
>>>>>>> legend(h1,y1Label,"location",'south',"fontname",'Helvetica');
>>>>>>>
>>>>>>> legend(h2,y2Label,"location",'northeast',"fontname",'Helvetica');
>>>>>>>
>>>>>>> Only the first legend shows up and the font is Courier which I am unable
>>>>>>> to change. Also the text in the legend precedes the key which I would
>>>>>>> like to invert using 'right' but it does not work either.
>>>>>>>
>>>>>>> I am using octave-3.4.0. Would anyone have an example?
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> --
>>>>>>> Valmor
>>>>>>>
>>>>>>> PS: In the above command I also tried legend(ax(1),...) and it does not
>>>>>>> make a difference.
>>>>>>
>>>>>> Octave tries to duplicate Matlab's implementation of plotyy and legend. 
>>>>>>
>>>>>>  x1 = 0:5:10;
>>>>>>  x2 = 0:10;
>>>>>>  y1 = rand (size (x1));
>>>>>>  y2 = rand (size (x2));
>>>>>>  [ax, h1, h2] = plotyy (x1, y1, x2, y2, @plot, @plot);
>>>>>>  y1Label = "y1";
>>>>>>  y2Label = "y2";
>>>>>>
>>>>>> The command below should produce the desired legend (please check, the 
>>>>>> implementation may have changed since 3.4.0).
>>>>>>
>>>>>>  legend ([h1, h2], {y1Label, y2Label}, "location", "south")
>>>>>>
>>>>>> The commands below should also work, but currently reverse the legend 
>>>>>> entries.
>>>>>>
>>>>>>  legend ({y1Label, y2Label}, "location", "south")
>>>>>>
>>>>>>  legend (y1Label, y2Label, "location", "south");
>>>>>>
>>>>>> I've entered a bug report in the tracker.
>>>>>>
>>>>>>  https://savannah.gnu.org/bugs/?35314
>>>>>>
>>>>>> Regarding "Fontsize", the legend function doesn't accept property 
>>>>>> names/values as input.
>>>>>>
>>>>>> To change the fontname, the legend command returns the handle to the 
>>>>>> legend. You can change its fontname property directly.
>>>>>>
>>>>>>  h = legend ([h1, h2], {y1Label, y2Label}, "location", "south")
>>>>>>  set (h, "fontname",'Helvetica") 
>>>>>>
>>>>>> Ben
>>>>>
>>>>> I've attached a changeset to the bug-tracker that fixes the legend 
>>>>> command so that all three versions below work the same.
>>>>>
>>>>>   legend ([h1, h2], {y1Label, y2Label}, "location", "south")
>>>>>
>>>>>   legend ({y1Label, y2Label}, "location", "south")
>>>>>
>>>>>   legend (y1Label, y2Label, "location", "south");
>>>>>
>>>>> The tracker link is below.
>>>>>
>>>>>   https://savannah.gnu.org/bugs/index.php?35314
>>>>>
>>>>> Ben
>>>>>
>>>>
>>>> Thanks Ben,
>>>>
>>>> None of the forms work for my version 3.4.0.
>>>>
>>>> error:   /usr/share/octave/3.4.0/m/plot/__gnuplot_print__.m at line 170,
>>>> column 5
>>>>
>>>> The handle to set the fontname does not work either. Which version are
>>>> you using? 3.4.3 is the highest I will be able to go unless I compile
>>>> octave myself.
>>>>
>>>> --
>>>> Valmor
>>>
>>>
>>> The error from __gnplot_print__() is something different. That function 
>>> only is called by print().
>>>
>>> Running 3.4.0, I checked ...
>>>
>>>     x = 0:10;
>>>     plotyy (x, sqrt(x), x, x.^2);
>>>     h = legend ("root", "squared");
>>>     set (h, "fontname", "Courier")
>>>     print test.eps
>>>     print test.png
>>>
>>> ... I encountered no errors, and obtained the expected results.
>>>
>>> Can you provide a simple example that produces the __gnuplot_print__ error ?
>>>
>>> Ben
>>
>> Hello Ben,
>>
>> Tried your example above and got
>>
>> octave:3> h = legend("root", "squared");
>> error: structure has no member `fontname'
>> error: evaluating argument list element number 1
>> error: called from:
>> error:   /usr/share/octave/3.4.0/m/plot/__go_draw_axes__.m at line 2086,
>> column 3
>> error:   /usr/share/octave/3.4.0/m/plot/__go_draw_axes__.m at line 1475,
>> column 31
>> error:   /usr/share/octave/3.4.0/m/plot/__go_draw_figure__.m at line
>> 119, column 21
>> error:   /usr/share/octave/3.4.0/m/plot/__gnuplot_drawnow__.m at line
>> 86, column 5
> 
> hmmm ... Please verify you get the same result below.
> 
>       class (h)
>       ans = double
>       ishandle (h)
>       ans =  1
>       get (h, "type")
>       ans = axes
> 
> Also verify ...
> 
>       which legend
>       `legend' is a function from the file 
> /usr/share/octave/3.4.0/m/plot/legend.m 
> 
> Ben
> 

I do.

Thanks,

--
Valmor