Thread: [matplotlib-devel] problems with labeling contour lines in 0.98.3

Hello David and the developers list-

I have had little luck on the mailing list, so sorry for writing you
directly (David may be on vacation).

I have two problems labeling contour lines in 0.98.3.

First, when I call clabel, it removes all contours that are not labeled
(because the label doesn't fit on the section of contour, I presume).
This seems like a bug to me (or a really odd feature). It doesn't do this
when inline = False, but I don't think it should do it either when inline =
True
Easy example:

>>> x,y = meshgrid( linspace(-10,10,50), linspace(-10,10,50) )
>>> z = log(x**2 + y**2)
>>> cobj = contour(x,y,z) # Note that there are 8 contours levels (11
contour sections in all)
>>> cobj.clabel()
<a list of 8 text.Text objects>
>>> draw()  # Now only 5 contours are drawn; the ones in the middle are
removed.

Second, when using the new manual labeling of contour labels (which is
pretty neat!), how do I end this feature?
The doc string says: right click, or potentially click both mouse buttons
together (which already worries me).
Neither works for me on win32, mpl 0.98.3, TkAgg backend, interactive mode.
Does anybody have a solution?

Thanks, Mark

David -

Enjoy your vacation.

I tried the contour_label_demo and it works fine, but my problem remains.

I suggest you try the example I provided below, and notice the difference
between labeling with inline=True and inline=False. When inline=True the
contours in the middle part (which don't get labeled, presumably because
there isn't enough room) get erased.

I figured out the manual input problem. The trick is that you require to
press the middle button to end (I'll do a post to the user's list). Many
laptops don't have a middle button. Although suggestions are found on the
web that pushing both buttons simultaneously works, I have never seen it
work. What you have to do is configure your touchpad such that a corner acts
as the middle button. Once I figured that out, I could end manually
selecting the labels. Very nice. If I may, I strongly recommend you change
the code such that pushing the right button ends the manual input. Is there
any reason not to use the right button for that?

I hope you can fix the inline problem. Thanks for all the other new cool
features,

Mark

On Tue, Aug 19, 2008 at 4:06 PM, <ka...@mp...> wrote:

> Hi,
>
> I am currently on vacation, so I can´t be of much help - back beginning of
> next month.  It would be useful if
> you could try the clabel and ginput demo scripts and send images of the
> resulting figures so that we can determine exactly what things work and
> don´t work.
>
> Thanks,
> David
>
>
>
> Mark Bakker <ma...@gm...> ha escrito:
>
>
>  Hello David and the developers list-
>>
>> I have had little luck on the mailing list, so sorry for writing you
>> directly (David may be on vacation).
>>
>> I have two problems labeling contour lines in 0.98.3.
>>
>> First, when I call clabel, it removes all contours that are not labeled
>> (because the label doesn't fit on the section of contour, I presume).
>> This seems like a bug to me (or a really odd feature). It doesn't do this
>> when inline = False, but I don't think it should do it either when inline
>> =
>> True
>> Easy example:
>>
>>  x,y = meshgrid( linspace(-10,10,50), linspace(-10,10,50) )
>>>>> z = log(x**2 + y**2)
>>>>> cobj = contour(x,y,z) # Note that there are 8 contours levels (11
>>>>>
>>>> contour sections in all)
>>
>>> cobj.clabel()
>>>>>
>>>> <a list of 8 text.Text objects>
>>
>>> draw()  # Now only 5 contours are drawn; the ones in the middle are
>>>>>
>>>> removed.
>>
>> Second, when using the new manual labeling of contour labels (which is
>> pretty neat!), how do I end this feature?
>> The doc string says: right click, or potentially click both mouse buttons
>> together (which already worries me).
>> Neither works for me on win32, mpl 0.98.3, TkAgg backend, interactive
>> mode.
>> Does anybody have a solution?
>>
>> Thanks, Mark
>>
>>
>
>
> ----------------------------------------------------------------
> This message was sent using IMP, the Internet Messaging Program.
>
>

Hi,

I am currently on vacation, so I can´t be of much help - back  
beginning of next month.  It would be useful if
you could try the clabel and ginput demo scripts and send images of  
the resulting figures so that we can determine exactly what things  
work and don´t work.

Thanks,
David



Mark Bakker <ma...@gm...> ha escrito:

> Hello David and the developers list-
>
> I have had little luck on the mailing list, so sorry for writing you
> directly (David may be on vacation).
>
> I have two problems labeling contour lines in 0.98.3.
>
> First, when I call clabel, it removes all contours that are not labeled
> (because the label doesn't fit on the section of contour, I presume).
> This seems like a bug to me (or a really odd feature). It doesn't do this
> when inline = False, but I don't think it should do it either when inline =
> True
> Easy example:
>
>>>> x,y = meshgrid( linspace(-10,10,50), linspace(-10,10,50) )
>>>> z = log(x**2 + y**2)
>>>> cobj = contour(x,y,z) # Note that there are 8 contours levels (11
> contour sections in all)
>>>> cobj.clabel()
> <a list of 8 text.Text objects>
>>>> draw()  # Now only 5 contours are drawn; the ones in the middle are
> removed.
>
> Second, when using the new manual labeling of contour labels (which is
> pretty neat!), how do I end this feature?
> The doc string says: right click, or potentially click both mouse buttons
> together (which already worries me).
> Neither works for me on win32, mpl 0.98.3, TkAgg backend, interactive mode.
> Does anybody have a solution?
>
> Thanks, Mark
>



----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

Hi,

Back from vacation.  The problem with not being able to end point
selection is easy to fix - allow keyboard clicks to also select points
and enter to also exit (this is the solution matlab uses).  This is easy
to add and I will try to work on it sometime over the next couple of
weeks.

I will try your example sometime soon and see what happens.  It sounds
like the problem has something to do with what happens when the label
covers the entire contour - currently the contour gets deleted entirely,
but this seems to be doing something strange in your case.

Cheers,
David


On Thu, 2008-08-21 at 16:02 +0200, Mark Bakker wrote:
> David -
> 
> Enjoy your vacation.
> 
> I tried the contour_label_demo and it works fine, but my problem
> remains.
> 
> I suggest you try the example I provided below, and notice the
> difference between labeling with inline=True and inline=False. When
> inline=True the contours in the middle part (which don't get labeled,
> presumably because there isn't enough room) get erased.
> 
> I figured out the manual input problem. The trick is that you require
> to press the middle button to end (I'll do a post to the user's list).
> Many laptops don't have a middle button. Although suggestions are
> found on the web that pushing both buttons simultaneously works, I
> have never seen it work. What you have to do is configure your
> touchpad such that a corner acts as the middle button. Once I figured
> that out, I could end manually selecting the labels. Very nice. If I
> may, I strongly recommend you change the code such that pushing the
> right button ends the manual input. Is there any reason not to use the
> right button for that?
> 
> I hope you can fix the inline problem. Thanks for all the other new
> cool features,
> 
> Mark
> 
> On Tue, Aug 19, 2008 at 4:06 PM, <ka...@mp...> wrote:
>         Hi,
>         
>         I am currently on vacation, so I can´t be of much help - back
>         beginning of next month.  It would be useful if
>         you could try the clabel and ginput demo scripts and send
>         images of the resulting figures so that we can determine
>         exactly what things work and don´t work.
>         
>         Thanks,
>         David
>         
>         
>         
>         Mark Bakker <ma...@gm...> ha escrito:
>         
>         
>         
>                 Hello David and the developers list-
>                 
>                 I have had little luck on the mailing list, so sorry
>                 for writing you
>                 directly (David may be on vacation).
>                 
>                 I have two problems labeling contour lines in 0.98.3.
>                 
>                 First, when I call clabel, it removes all contours
>                 that are not labeled
>                 (because the label doesn't fit on the section of
>                 contour, I presume).
>                 This seems like a bug to me (or a really odd feature).
>                 It doesn't do this
>                 when inline = False, but I don't think it should do it
>                 either when inline =
>                 True
>                 Easy example:
>                 
>                                         x,y =
>                                         meshgrid( linspace(-10,10,50),
>                                         linspace(-10,10,50) )
>                                         z = log(x**2 + y**2)
>                                         cobj = contour(x,y,z) # Note
>                                         that there are 8 contours
>                                         levels (11
>                 contour sections in all)
>                                         cobj.clabel()
>                 <a list of 8 text.Text objects>
>                                         draw()  # Now only 5 contours
>                                         are drawn; the ones in the
>                                         middle are
>                 removed.
>                 
>                 Second, when using the new manual labeling of contour
>                 labels (which is
>                 pretty neat!), how do I end this feature?
>                 The doc string says: right click, or potentially click
>                 both mouse buttons
>                 together (which already worries me).
>                 Neither works for me on win32, mpl 0.98.3, TkAgg
>                 backend, interactive mode.
>                 Does anybody have a solution?
>                 
>                 Thanks, Mark
>                 
>         
>         
>         
>         
>         ----------------------------------------------------------------
>         This message was sent using IMP, the Internet Messaging
>         Program.
>         
> 
> 
-- 
**********************************
David M. Kaplan
Charge de Recherche 1
Institut de Recherche pour le Developpement
Centre de Recherche Halieutique Mediterraneenne et Tropicale
av. Jean Monnet
B.P. 171
34203 Sete cedex
France

Phone: +33 (0)4 99 57 32 27
Fax: +33 (0)4 99 57 32 95
http://www.ur097.ird.fr/team/dkaplan/index.html
**********************************

Hello David -

Sorry for the late reply. I am back from vacation.

Any luck on solving the problem of the disappearing contour lines when
labelling? It works fine when you don't use the 'inline', but the picture is
of course not as nice, as the labels are not in-line anymore. Maybe that
gives a clue to what goes wrong?

Thanks, Mark

On Wed, Sep 3, 2008 at 12:47 PM, David M. Kaplan <Dav...@ir...>wrote:

> Hi,
>
> Back from vacation.  The problem with not being able to end point
> selection is easy to fix - allow keyboard clicks to also select points
> and enter to also exit (this is the solution matlab uses).  This is easy
> to add and I will try to work on it sometime over the next couple of
> weeks.
>
> I will try your example sometime soon and see what happens.  It sounds
> like the problem has something to do with what happens when the label
> covers the entire contour - currently the contour gets deleted entirely,
> but this seems to be doing something strange in your case.
>
> Cheers,
> David
>
>
> On Thu, 2008-08-21 at 16:02 +0200, Mark Bakker wrote:
> > David -
> >
> > Enjoy your vacation.
> >
> > I tried the contour_label_demo and it works fine, but my problem
> > remains.
> >
> > I suggest you try the example I provided below, and notice the
> > difference between labeling with inline=True and inline=False. When
> > inline=True the contours in the middle part (which don't get labeled,
> > presumably because there isn't enough room) get erased.
> >
> > I figured out the manual input problem. The trick is that you require
> > to press the middle button to end (I'll do a post to the user's list).
> > Many laptops don't have a middle button. Although suggestions are
> > found on the web that pushing both buttons simultaneously works, I
> > have never seen it work. What you have to do is configure your
> > touchpad such that a corner acts as the middle button. Once I figured
> > that out, I could end manually selecting the labels. Very nice. If I
> > may, I strongly recommend you change the code such that pushing the
> > right button ends the manual input. Is there any reason not to use the
> > right button for that?
> >
> > I hope you can fix the inline problem. Thanks for all the other new
> > cool features,
> >
> > Mark
> >
> > On Tue, Aug 19, 2008 at 4:06 PM, <ka...@mp...> wrote:
> >         Hi,
> >
> >         I am currently on vacation, so I can´t be of much help - back
> >         beginning of next month.  It would be useful if
> >         you could try the clabel and ginput demo scripts and send
> >         images of the resulting figures so that we can determine
> >         exactly what things work and don´t work.
> >
> >         Thanks,
> >         David
> >
> >
> >
> >         Mark Bakker <ma...@gm...> ha escrito:
> >
> >
> >
> >                 Hello David and the developers list-
> >
> >                 I have had little luck on the mailing list, so sorry
> >                 for writing you
> >                 directly (David may be on vacation).
> >
> >                 I have two problems labeling contour lines in 0.98.3.
> >
> >                 First, when I call clabel, it removes all contours
> >                 that are not labeled
> >                 (because the label doesn't fit on the section of
> >                 contour, I presume).
> >                 This seems like a bug to me (or a really odd feature).
> >                 It doesn't do this
> >                 when inline = False, but I don't think it should do it
> >                 either when inline =
> >                 True
> >                 Easy example:
> >
> >                                         x,y =
> >                                         meshgrid( linspace(-10,10,50),
> >                                         linspace(-10,10,50) )
> >                                         z = log(x**2 + y**2)
> >                                         cobj = contour(x,y,z) # Note
> >                                         that there are 8 contours
> >                                         levels (11
> >                 contour sections in all)
> >                                         cobj.clabel()
> >                 <a list of 8 text.Text objects>
> >                                         draw()  # Now only 5 contours
> >                                         are drawn; the ones in the
> >                                         middle are
> >                 removed.
> >
> >                 Second, when using the new manual labeling of contour
> >                 labels (which is
> >                 pretty neat!), how do I end this feature?
> >                 The doc string says: right click, or potentially click
> >                 both mouse buttons
> >                 together (which already worries me).
> >                 Neither works for me on win32, mpl 0.98.3, TkAgg
> >                 backend, interactive mode.
> >                 Does anybody have a solution?
> >
> >                 Thanks, Mark
> >
> >
> >
> >
> >
> >         ----------------------------------------------------------------
> >         This message was sent using IMP, the Internet Messaging
> >         Program.
> >
> >
> >
> --
> **********************************
> David M. Kaplan
> Charge de Recherche 1
> Institut de Recherche pour le Developpement
> Centre de Recherche Halieutique Mediterraneenne et Tropicale
> av. Jean Monnet
> B.P. 171
> 34203 Sete cedex
> France
>
> Phone: +33 (0)4 99 57 32 27
> Fax: +33 (0)4 99 57 32 95
> http://www.ur097.ird.fr/team/dkaplan/index.html
> **********************************
>
>
>

Hi,

Yes, I have fixed the problem in my version of matplotlib, but I haven't
had the time to look over all of my changes and commit them to SVN.
Next week things should get better.  If you are really in a hurry, you
can try applying the attached patch set to SVN, but better to wait and
let me make sure it is all kosher.

Cheers,
David


On Fri, 2008-09-12 at 11:29 +0200, Mark Bakker wrote:
> Hello David -
> 
> Sorry for the late reply. I am back from vacation.
> 
> Any luck on solving the problem of the disappearing contour lines when
> labelling? It works fine when you don't use the 'inline', but the
> picture is of course not as nice, as the labels are not in-line
> anymore. Maybe that gives a clue to what goes wrong?
> 
> Thanks, Mark
> 
> On Wed, Sep 3, 2008 at 12:47 PM, David M. Kaplan <Dav...@ir...>
> wrote:
>         Hi,
>         
>         Back from vacation.  The problem with not being able to end
>         point
>         selection is easy to fix - allow keyboard clicks to also
>         select points
>         and enter to also exit (this is the solution matlab uses).
>          This is easy
>         to add and I will try to work on it sometime over the next
>         couple of
>         weeks.
>         
>         I will try your example sometime soon and see what happens.
>          It sounds
>         like the problem has something to do with what happens when
>         the label
>         covers the entire contour - currently the contour gets deleted
>         entirely,
>         but this seems to be doing something strange in your case.
>         
>         Cheers,
>         David
>         
>         
>         
>         On Thu, 2008-08-21 at 16:02 +0200, Mark Bakker wrote:
>         > David -
>         >
>         > Enjoy your vacation.
>         >
>         > I tried the contour_label_demo and it works fine, but my
>         problem
>         > remains.
>         >
>         > I suggest you try the example I provided below, and notice
>         the
>         > difference between labeling with inline=True and
>         inline=False. When
>         > inline=True the contours in the middle part (which don't get
>         labeled,
>         > presumably because there isn't enough room) get erased.
>         >
>         > I figured out the manual input problem. The trick is that
>         you require
>         > to press the middle button to end (I'll do a post to the
>         user's list).
>         > Many laptops don't have a middle button. Although
>         suggestions are
>         > found on the web that pushing both buttons simultaneously
>         works, I
>         > have never seen it work. What you have to do is configure
>         your
>         > touchpad such that a corner acts as the middle button. Once
>         I figured
>         > that out, I could end manually selecting the labels. Very
>         nice. If I
>         > may, I strongly recommend you change the code such that
>         pushing the
>         > right button ends the manual input. Is there any reason not
>         to use the
>         > right button for that?
>         >
>         > I hope you can fix the inline problem. Thanks for all the
>         other new
>         > cool features,
>         >
>         > Mark
>         >
>         > On Tue, Aug 19, 2008 at 4:06 PM, <ka...@mp...> wrote:
>         >         Hi,
>         >
>         >         I am currently on vacation, so I can´t be of much
>         help - back
>         >         beginning of next month.  It would be useful if
>         >         you could try the clabel and ginput demo scripts and
>         send
>         >         images of the resulting figures so that we can
>         determine
>         >         exactly what things work and don´t work.
>         >
>         >         Thanks,
>         >         David
>         >
>         >
>         >
>         >         Mark Bakker <ma...@gm...> ha escrito:
>         >
>         >
>         >
>         >                 Hello David and the developers list-
>         >
>         >                 I have had little luck on the mailing list,
>         so sorry
>         >                 for writing you
>         >                 directly (David may be on vacation).
>         >
>         >                 I have two problems labeling contour lines
>         in 0.98.3.
>         >
>         >                 First, when I call clabel, it removes all
>         contours
>         >                 that are not labeled
>         >                 (because the label doesn't fit on the
>         section of
>         >                 contour, I presume).
>         >                 This seems like a bug to me (or a really odd
>         feature).
>         >                 It doesn't do this
>         >                 when inline = False, but I don't think it
>         should do it
>         >                 either when inline =
>         >                 True
>         >                 Easy example:
>         >
>         >                                         x,y =
>         >
>         meshgrid( linspace(-10,10,50),
>         >
>         linspace(-10,10,50) )
>         >                                         z = log(x**2 + y**2)
>         >                                         cobj =
>         contour(x,y,z) # Note
>         >                                         that there are 8
>         contours
>         >                                         levels (11
>         >                 contour sections in all)
>         >                                         cobj.clabel()
>         >                 <a list of 8 text.Text objects>
>         >                                         draw()  # Now only 5
>         contours
>         >                                         are drawn; the ones
>         in the
>         >                                         middle are
>         >                 removed.
>         >
>         >                 Second, when using the new manual labeling
>         of contour
>         >                 labels (which is
>         >                 pretty neat!), how do I end this feature?
>         >                 The doc string says: right click, or
>         potentially click
>         >                 both mouse buttons
>         >                 together (which already worries me).
>         >                 Neither works for me on win32, mpl 0.98.3,
>         TkAgg
>         >                 backend, interactive mode.
>         >                 Does anybody have a solution?
>         >
>         >                 Thanks, Mark
>         >
>         >
>         >
>         >
>         >
>         >
>         ----------------------------------------------------------------
>         >         This message was sent using IMP, the Internet
>         Messaging
>         >         Program.
>         >
>         >
>         >
>         
>         --
>         **********************************
>         David M. Kaplan
>         Charge de Recherche 1
>         Institut de Recherche pour le Developpement
>         Centre de Recherche Halieutique Mediterraneenne et Tropicale
>         av. Jean Monnet
>         B.P. 171
>         34203 Sete cedex
>         France
>         
>         Phone: +33 (0)4 99 57 32 27
>         Fax: +33 (0)4 99 57 32 95
>         http://www.ur097.ird.fr/team/dkaplan/index.html
>         **********************************
>         
>         
> 
> 
-- 
**********************************
David M. Kaplan
Charge de Recherche 1
Institut de Recherche pour le Developpement
Centre de Recherche Halieutique Mediterraneenne et Tropicale
av. Jean Monnet
B.P. 171
34203 Sete cedex
France

Phone: +33 (0)4 99 57 32 27
Fax: +33 (0)4 99 57 32 95
http://www.ur097.ird.fr/team/dkaplan/index.html
**********************************