Re: Text on plots

[Ben Abbott]

On Tuesday, January 27, 2009, at 10:10AM, "dmelliott" <address@hidden> wrote:
>
>  ----- Original Message ----- 
>  From: Ben Abbott 
>  To: dmelliott 
>  Cc: GNU Octave 
>  Sent: Monday, January 26, 2009 7:52 AM
>  Subject: Re: Text on plots
>
>
>On Monday, January 26, 2009, at 08:14AM, "dmelliott" <address@hidden> wrote:
>
>>  ----- Original Message ----- 
>>  From: Ben Abbott 
>>  To: dmelliott 
>>  Cc: address@hidden 
>>  Sent: Sunday, January 25, 2009 2:49 PM
>>  Subject: Re: Text on plots
>>
>>  On Jan 25, 2009, at 1:26 PM, dmelliott wrote:
>>
>>  >
>>  > Dear Help,
>>  >
>>  >     When I copy the example in the "octave help" at the beginning of  
>>  > section 15.1.3 Plot Annotations into an m-file and try to run it,  
>>  > absolutely no text appears on the graph other than the axis numbering.
>>  >     I have tried the methods that I used, successfully, in Matlab,  
>>  > and they do not work either.  How can I make a graph title and axis  
>>  > labels on a figure generated with "plot"?
>>  >     I am using the handle graphics.
>>  >
>>  >
>>  >                                                                           
>>            More 
>>  >  than a bit frustrated,
>>  >
>>  >                                                                           
>>                           Douglas 
>>  >  M Elliott
>>
>>  I assume you are trying something like what is below?
>>
>>  set (get (gca, 'xlabel'), 'string', 'some xlabel'))
>>
>>  Depending upon the version of octave you are running that may not work.
>>
>>  It does work for me (Octave 3.0.3). What version of Octave are your  
>>  running?
>>
>>  If you are running an older version, you can update your octave or  
>>  take the advice offered by Bill and Ivan.
>>
>>  Ben
>>
>>
>>Dear Mr. Abbott,
>>
>>    Thank you for your very speedy reply.
>>
>>    The way you suggest makes perfect sense to me, having used Matlab for 
>> years.  However, I can not get it to work.  If I could ask a small favor of 
>> you, it would be greatly appreciated.
>>
>>    Could you rewrite and test the example from the directions:
>>
>>
>>                                    x=-10:0.1:10;
>>                                    plot(x,sin(x));
>>                                    title("sin(x)  for  x=-10:0.1:10");
>>                                    xlabel("x");
>>                                    ylabel("sin(x)");
>>                                    text(pi,0.7,"arbitrary text");
>>                                    legend("sin(x)");
>>
>>
>>and send the working code back.  If I had something that I know should work, 
>>then I might be able to proceed.
>>
>>    I have tried every combination of things that I can think of, with no 
>> success.  I uninstalled V3.0.3, download it again, and installed it only to 
>> have exactly the same results.  The OS is XP.  When installing, every 
>> possible option was chosen.
>>
>>    There are several things that are working just fine such as line,  
>> toolbar, numbertitle, figure name and position, axes tics, grid, and number 
>> formatting, etc.  Everything but the text.
>>
>>
>>                                                                              
>>     Thanking you in advance,
>>
>>                                                                              
>>                 Douglas M. Elliott
>
>
>Your code works perfectly for me. I have no experience with octave on XP. In 
>the event someone else can help, I've cc'd the help list again (we dropped of 
>at some point).
>
>It may be that octave is working properly and that the trouble is with 
>gnuplot. Please try to determine what version of gnuplot you have installed, 
>and were you got it from. It may also be useful to know where you obtained 
>Octave from.
>
>Regarding gnuplot, we can take a look at the information being sent from 
>octave to gnuplot. That should help us determine where your problem lies. You 
>can save the gnuplot stream by typing the following after the plot commands 
>have been executed.
>
>        drawnow ("windows", "/dev/null", true, "windows.gp")
>
>Please attach the result to your next reply and I'll look it over.
>
>Ben
>
>p.s. please respond at the bottom so that others who join the discussion have 
>an easier time following along. Thanks.
>
>
>___________________________________
>
>
>Dear Mr. Abbott,
>
>    Whatever it is that I have, I got from:
>
>        
> http://sourceforge.net/project/showfiles.php?group_id=2888&package_id=40078
>
>selecting V3.0.3.
>
>
>    As to the gnuplot version, using the function given in the included docs:
>
>        version=__gnuplot_version__()
>
>version 4.3 is reported.  This strikes me as odd since SourceForge's latest is 
>4.2.4.  The executables themselves were, for some reason, written without a 
>"properties" section, so I can not tell from that.
>
>
>    Alternatively, it could be in the mfiles.  I was advised earlier, for a 
> related problem, to try:
>
>        pkg load jhandles
>        help uicontrol
>
>by Mr. Goffioul, and got an error message saying that uicontrol was not 
>documented.  I get any number of "not there's" when I try to set properties 
>that the directions say I should be able to, so it could be in the mfile 
>interfaces.
>
>
>    I note that there is a caution for the 4.2 versions at SourceForge:
>
>"- Octave has recently changed its method of sending data to gnuplot for  
>plotting; data is passed in-line through the pipe to gnuplot's stdin.   
>Unfortunately, the current Gnuplot 4.2 code does not support mouse interaction 
>with in-line data. This problem is fixed in the CVS version, but not in the 
>current release version 4.2.4."
>
>Now if I knew where the CVS version was, I might be able to download it.
>
>
>    I tried your suggestion:
>
>            drawnow ("windows","/dev/null",true,"windows.gp")
>
>thank you, and got:
>
>        error: unsupported output format: windows

ok, as I don't have a windows box, it is likely I got that wrong. Try

        drawnow ("x11", "/dev/null", true, "x11.gp")

You will get some errors, but the x11.gp file should be written to the current 
directory.

>This makes sense given the function file content:
>
>        function drawnow (term, file, mono, debugfile)
>
>        h = get(0, 'currentfigure');
>        if (! isempty (h) && h != 0 && ishandle (h))
>          fig = __get_object__ (h);
>          if (nargin == 0)
>            fig.redraw ();
>          elseif (nargin >= 2)
>            elt = cellstr (split (term, " "));
>            switch elt{1}
>            case {"png", "postscript"}
>              fig.print (elt{1}, file);
>            otherwise
>              error ("unsupported output format: %s", term);
>            endswitch
>          endif
>        endif
>
>        endfunction

hmmm ... that is definitely not the correct file. I'd guess you had an earlier 
octave install and your present installation is pointed at its path.

What do you get when you type the following

    path

In any event, try typing the following lines ...

    path (pathdef);
    savepath;

... and then try some more plots. Hopefully, that will fix your problem.

Ben