matplotlib-users

[Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

  http://matplotlib.sourceforge.net
 	
What's new in matplotlib 0.42

EPS output from PS backend

  Just add an eps extension

PS and EPS save from GTK and WX backends with bugs fixed

  A few of the bugs that were lingering in the PS output from the GTK
  backend have been cleared up. A fairly substantial refactoring of
  the Text class enabled this. Text is now backend independent and
  behaves like the other artists in the figure (lines, patches,
  etc). Additionally, PS and EPS save from WX backend work

Object picker example

  The file examples/object_picker.py is a template showing how to
  select objects in the figure with the mouse(eg, text, lines). If you
  click on the line, a properties dialog will pop up. You can edit the
  line properties. This is just a template for those who want to
  develop a GUI properties dialog. If interested, contact the mailing
  list. It would be straight forward to extend this example to allow
  you to move objects in the figure, etc

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:

>>>>>>"LUK" == LUK ShunTim <shu...@po...> writes:
> 
> 
>     LUK> Yes. I did "python log_demo.py", got the gtk GUI and clicked
>     LUK> on the "save" icon to produce the eps file. So it is as you
>     LUK> said, it comes from the GUI backend. No warning when I did
>     LUK> "python log_demo.py -dPS"
> 
> OK, now we at least know where the problem is.  I don't get such an
> error message on my system (rhl9, pygtk-2.0.0).  What platform are you
> on, and what versions of GTK and pygtk are you running?
> 
> JDH
> 
> 
> 

W2K, Enthought python 2.3, pygtk 2.0, gtk 2.0

Regards,
ST

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    >> OK, now we at least know where the problem is.  I don't get
    >> such an error message on my system (rhl9, pygtk-2.0.0).  What
    >> platform are you on, and what versions of GTK and pygtk are you
    >> running?  JDH
    >> 

    LUK> W2K, Enthought python 2.3, pygtk 2.0, gtk 2.0

Hi Luk,

I get the same error message on my WinXP platform.  I recently
decoupled the text code from the various backends (gtk, ps, etc).  In
the past, each backend specified their own default font, and this is
no longer possible since text is now backend independent.  On the
upside, this enables you to save PS or EPS from a GTK or WX GUI
window.  On the downside, this exposes the problem that font choosing
is not backend independent.  We've talked a number of times about the
importance of this on matplotlib-devel, but haven't done the dirty
work of actually getting it implemented.

So in a nutshell, there is nothing wrong with your setup.  We on the
development side just need to spend some time getting fonts
standardized across backends.  Ie, we need to agree on a bare minimum
number of fonts with standard names that we can provide on all the
backends, so scripts using these names will work on all the backends.
This is complicated by the fact that most fonts are proprietary, so we
can't ship them or guarantee their existence on a given system.

It's on the list of things to do.  If this proves to be a major
impediment for you in the mean time, don't hesitate to bring it up
again.  Sometimes those who complain the loudest get their bugs fixed
the soonest.

JDH

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    >> OK, now we at least know where the problem is.  I don't get
    >> such an error message on my system (rhl9, pygtk-2.0.0).  What
    >> platform are you on, and what versions of GTK and pygtk are you
    >> running?  JDH

    LUK> W2K, Enthought python 2.3, pygtk 2.0, gtk 2.0

Tracked this one down.  Apparently the latest version of GTK for
windows does different font aliasing.  This is controlled by the file

c:\gtk\etc\pango\pango.aliases

Try adding the line:

times = "times new roman,angsana new,mingliu,simsun,gulimche,ms gothic,latha,mangal,code2000"

If you get other font messages, adding more font aliases to this file
may help.

I'm making some changes in the gtk backend - mapping times -> serif,
so in the next release of matplotlib this should be fixed
automagically.

JDH

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:
>   http://matplotlib.sourceforge.net
>  	
> What's new in matplotlib 0.42
> 
> EPS output from PS backend
> 
>   Just add an eps extension
> 
> PS and EPS save from GTK and WX backends with bugs fixed
> 

[snipped]

Thanks very much. I did an upgrade via CVS and the eps output works fine.

A slight glitch though. I think John has changed the AFMPATH 
environmental variable to MATPLOTLIBDATA (which is a more appropriate 
name) so people installing matplotlib in non-default places will have to 
set it instead.

Regards,
ST
--

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:
>   http://matplotlib.sourceforge.net
>  	
> What's new in matplotlib 0.42
> 
> EPS output from PS backend
> 
>   Just add an eps extension
> 
> PS and EPS save from GTK and WX backends with bugs fixed
> 

[snipped]

Thanks very much. I did an upgrade via CVS and the eps output works fine.

A slight glitch though. I think John has changed the AFMPATH
environmental variable to MATPLOTLIBDATA (which is a more appropriate
name) so people installing matplotlib in non-default places will have to
set it instead.

Regards,
ST
--

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    LUK> A slight glitch though. I think John has changed the AFMPATH
    LUK> environmental variable to MATPLOTLIBDATA (which is a more
    LUK> appropriate name) so people installing matplotlib in
    LUK> non-default places will have to set it instead.

ps backend is setup to use both, the idea that you may have some AFM
files independent of matplotlib, and some that ship with matplotlib.
The MATPLOTLIBDATA is indeed for people installing in nonstandard
places.  But if AFMPATH is not working for you, I need to know since
this is a bug.

Thanks!
John Hunter

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:
>>>>>>"LUK" == LUK ShunTim <shu...@po...> writes:
> 
> 
>     LUK> A slight glitch though. I think John has changed the AFMPATH
>     LUK> environmental variable to MATPLOTLIBDATA (which is a more
>     LUK> appropriate name) so people installing matplotlib in
>     LUK> non-default places will have to set it instead.
> 
> ps backend is setup to use both, the idea that you may have some AFM
> files independent of matplotlib, and some that ship with matplotlib.
> The MATPLOTLIBDATA is indeed for people installing in nonstandard
> places.  But if AFMPATH is not working for you, I need to know since
> this is a bug.
> 
> Thanks!
> John Hunter
> 

I think that's an oversight of mine. I had AFMPATH set to point to the directory 
which holds the afm, xpm files etc before I upgrade. After upgrading I got the 
error described above and I found out that I have to set MATPLOTLIBDATA. I did 
not realize that AFMPATH is *still* used.

I have tex installed so I hope I can use quite a lot more fonts now. Is the path 
to the .afm files all that is needed? Do I have to set anything else, for 
example where to find the pfa/pfb files? I found that matplotlib spits out 
warnings like

** (log_demo.py:1264): WARNING **: Couldn't load font "Times 9.599609375"
falling back to "Sans 9.599609375"

Regards,
ST

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    LUK> I have tex installed so I hope I can use quite a lot more
    LUK> fonts now. Is the path to the .afm files all that is needed?
    LUK> Do I have to set anything else, for example where to find the
    LUK> pfa/pfb files? I found that matplotlib spits out warnings
    LUK> like

All matplotlib needs is the *.afm files.  It uses this to compute text
lengths, etc, for layout.  You'll just need to provide the right font
names to the text commands, perhaps using a font dictionary as in
examples/text_themes.py.  Your postscript output device will still
need to know about the fonts of course.  Note that I use a custom font
matching scheme in backend_ps and I certainly don't claim that it is
ideal.  So if you encounter strange behavior, let me know.

    LUK> ** (log_demo.py:1264): WARNING **: Couldn't load font "Times
    LUK> 9.599609375" falling back to "Sans 9.599609375"

This doesn't look like a backend_ps error.  Have you upgraded to
matplotlib-0.42.2?  I've reworked text handling in the backends so
it's hard for me to compare what I've got now without knowing what
version of matplotlib you're using.

JDH

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:

>>>>>>"LUK" == LUK ShunTim <shu...@po...> writes:
> 
> 
>     LUK> I have tex installed so I hope I can use quite a lot more
>     LUK> fonts now. Is the path to the .afm files all that is needed?
>     LUK> Do I have to set anything else, for example where to find the
>     LUK> pfa/pfb files? I found that matplotlib spits out warnings
>     LUK> like
> 
> All matplotlib needs is the *.afm files.  It uses this to compute text
> lengths, etc, for layout.  You'll just need to provide the right font
> names to the text commands, perhaps using a font dictionary as in
> examples/text_themes.py.  Your postscript output device will still
> need to know about the fonts of course.  Note that I use a custom font
> matching scheme in backend_ps and I certainly don't claim that it is
> ideal.  So if you encounter strange behavior, let me know.
> 
>     LUK> ** (log_demo.py:1264): WARNING **: Couldn't load font "Times
>     LUK> 9.599609375" falling back to "Sans 9.599609375"
> 
> This doesn't look like a backend_ps error.  Have you upgraded to
> matplotlib-0.42.2?  I've reworked text handling in the backends so
> it's hard for me to compare what I've got now without knowing what
> version of matplotlib you're using.
> 
> JDH
> 

CVS.

ST

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:
    LUK> ** (log_demo.py:1264): WARNING **: Couldn't load font "Times
    LUK> 9.599609375" falling back to "Sans 9.599609375"

    LUK> CVS.

Are you sure you are getting this message from the PS backend???  This
looks more like a message coming from one of the GUI backends.  I
don't generate any error messages like this in matplotlib.

With a fresh cvs checkout:

hunter:~/tmp/matplotlib> grep -ri 'falling back to' .

turns up nothing.

JDH

Re: [Matplotlib-users] ANN matplotlib-0.42

[LUK S. <shu...@po...>]

John Hunter wrote:

>>>>>>"LUK" == LUK ShunTim <shu...@po...> writes:
> 
>     LUK> ** (log_demo.py:1264): WARNING **: Couldn't load font "Times
>     LUK> 9.599609375" falling back to "Sans 9.599609375"
> 
>     LUK> CVS.
> 
> Are you sure you are getting this message from the PS backend???  This
> looks more like a message coming from one of the GUI backends.  I
> don't generate any error messages like this in matplotlib.
> 
> With a fresh cvs checkout:
> 
> hunter:~/tmp/matplotlib> grep -ri 'falling back to' .
> 
> turns up nothing.
> 
> JDH
> 
> 
> 
> 

Yes. I did "python log_demo.py", got the gtk GUI and clicked on the "save" icon 
to produce the eps file. So it is as you said, it comes from the GUI backend. No 
warning when I did "python log_demo.py -dPS"

Regards,
ST
--

Re: [Matplotlib-users] ANN matplotlib-0.42

[John H. <jdh...@ac...>]

>>>>> "LUK" == LUK ShunTim <shu...@po...> writes:

    LUK> Yes. I did "python log_demo.py", got the gtk GUI and clicked
    LUK> on the "save" icon to produce the eps file. So it is as you
    LUK> said, it comes from the GUI backend. No warning when I did
    LUK> "python log_demo.py -dPS"

OK, now we at least know where the problem is.  I don't get such an
error message on my system (rhl9, pygtk-2.0.0).  What platform are you
on, and what versions of GTK and pygtk are you running?

JDH