Re: change position of x-axis

[Juan Pablo Carbajal]

On Tue, Oct 11, 2011 at 6:21 PM, Juan Pablo Carbajal
<address@hidden> wrote:
> On Tue, Oct 11, 2011 at 5:56 PM, Juan Pablo Carbajal
> <address@hidden> wrote:
>> On Tue, Oct 11, 2011 at 4:42 PM, bpabbott <address@hidden> wrote:
>>> On Oct 11, 2011, at 10:28 AM, Juan Pablo Carbajal <address@hidden>
>>> wrote:
>>>
>>> On Tue, Oct 11, 2011 at 4:16 PM, Juan Pablo Carbajal <address@hidden>
>>> wrote:
>>>>
>>>> On Tue, Oct 11, 2011 at 2:44 PM, Ben Abbott <address@hidden> wrote:
>>>>>
>>>>> On Oct 11, 2011, at 8:29 AM, Vlăduţ Frăţiman wrote:
>>>>>
>>>>> Thanks!
>>>>>
>>>>> I already try'it that but seem to be an bug. My plot show an intrerupted
>>>>> line and old axis don't disspear.
>>>>> I use octave 3.2.1 on Ubuntu 11.04. Plots are rendered with gnuplot.
>>>>> I put an image as attachament to see what i mean.
>>>>>
>>>>> <graf.png>
>>>>>
>>>>> It works correctly for me. Perhaps we're doing something else differently
>>>>> that it producing a different result?
>>>>> The following works for me.
>>>>> close all
>>>>> clear all
>>>>> x = 0:0.1:10;
>>>>> y = sin(x)./(1+x) + x*01 - .4;
>>>>> plot (x, y);
>>>>> set (gca, "xaxislocation", "zero")
>>>>> print test.png
>>>>> preview test.png
>>>>> Does this work for you?
>>>>> Ben
>>>>
>>>> Ben,
>>>> please add the line
>>>>
>>>> set (gca, "box", "off")
>>>>
>>>> to see the remainding of the axis. This problem is even in the plot
>>>> "polar" when the box is switched off.
>>>
>>> Indeed,
>>> I posted this issue it in the help mailing list a few days ago
>>>
>>> http://octave.1599824.n4.nabble.com/Axis-issue-td3887910.html
>>>
>>>
>>> This may be a feature of gnuplot.
>>> If you'd like to experiment with gnuplot to see if the horizontal line at
>>> the bottom can be suppressed, you can save the gnuplot plotstream by ...
>>> drawnow ("png", "debug.png", false, "debug.gp")
>>> Then run gnuplot and type ...
>>> load "debug.gp"
>>> Each time you load "debug.gp" the file "debug.png" will be saved. You can
>>> try modifying the gnuplot commands in gnuplot.gp to get the desired result.
>>> If you're successful, I should be able to modify Octave's sources to fix
>>> this.
>>> Ben
>>>
>>>
>>>
>>
>> Hi Ben,
>>
>> Thanks for that. I am doing what you suggested, but I get binary code
>> or something like that in debug.gp. How do you edit this files?
>>
>> --
>> M. Sc. Juan Pablo Carbajal
>> -----
>> PhD Student
>> University of Zürich
>> http://ailab.ifi.uzh.ch/carbajal/
>>
>
> Ben,
> Ok, I found the problem.
> As I see it, when set(gca,'box','off') is executed, the stream to gnuplot adds
>> unset y2tics; set ytics in nomirror
>> unset x2tics; set xtics in nomirror
>> set border 3;
>
> The last line is the problem. With this I see that box off in octave
> means "axes in the left-botom margins".
>
> I see three possible solutions:
> 1. Make set(gca,'box','off') deal with the current state of axis.
> 2. Make set(gca,'box','off') be gnuplot's "unset border"
> 3. Make set(gca,'yaxislocation','zero') be gnuplot's "set yzeroaxis;
> set border 1; "
>    Make set(gca,'xaxislocation','zero') be gnuplot's "set xzeroaxis;
> set border 2; "
>
> Thanks
>
> --
> M. Sc. Juan Pablo Carbajal
> -----
> PhD Student
> University of Zürich
> http://ailab.ifi.uzh.ch/carbajal/
>

I forgot to add that the last solution (number 3) is a solution when
not both axis are placed to the origin. When both are placed to the
origin the only solution is to make box off be "unset border" fro
gnuplot.

Thanks


-- 
M. Sc. Juan Pablo Carbajal
-----
PhD Student
University of Zürich
http://ailab.ifi.uzh.ch/carbajal/