Installing matplotlib with Mac OS 10.6

Community matplotlib-users
1

Hello.

I am finding it very difficult to install matplotlib with snow leopard. I have the Apple XCODE installed along with numpy (which I have tested and works) and am running the python 2.6 version that comes with the Mac.

I have run into the following problems:
1) The diskimage installation: When I open the installer, I am told that I can not install matplotlib on my disk because I do not have a system version of python 2.6. I do not understand this error since I am running the default version (which is 2.6.1).

2) As another person on the list pointed out, easy_install matplotlib tries to install an older version that does not work with the newer version of numpy.

3) I downloaded the matplotlib-0.99.1.1-py2.6 egg. I was able to install matplotlib, seemingly. When I import pylab into python, I do not get any errors. However, I do get an error when I try to plot. With the default backend TkAgg (version 8.5), I get the following error when I try to plot:
_tkinter.TclError: integer value too large to represent

When I try to change the backend to MacOSX, a window opens labeled Figure 1, but nothing plots. With the verbose level on helpful, I find only that "backend MacOSX version unknown".

Has anyone seen any of these problems before and have an idea as to how to fix this? If not, is there another method that I should try (I'm hesitant to try to build/install from the source).

Thank you for any help!

2

Hi all,
I made a typical plot, and tried to save it to EPS. The resulting file is un-openable in gimp, the gnome thumbnail viewer, evince, and anything else I have tried.
Is there any problem saving a plot to EPS at the moment?

Cheers
Mike

3

Hi Lisa,

I had lots of trouble installing on 10.6 as well. What finally worked for me
is to use the (recommended) file make.osx that comes with the matplotlib
download. You have to edit that file to point to the versions of Python (you
want 2.6) and OSX (you want 10.6). I'm attaching a version that has all
these edits already made. (I'm assuming you have an intel Mac, not a ppc).

Look at the top of the file and you will see an example command line that
begins with PREFIX. You'll execute that command line with the example
directory changed to your directory and I highly recommend choosing the
directory /Users/(whatever your user name is)/.local All the libraries will
be installed there and Python will know how to find them even without
explicitly putting them in any PATH variable. This command line will even
check for required dependencies like freetype2, pnglib, ... And will go them
and install them for you if you don't already have them. The command line
should look like:
sudo PREFIX=/Users/(your username)/.local make -f make.osx fetch deps
mpl_install

Good luck,
Bill

make.osx (3.34 KB)

···

On 12/2/09 12:31 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

Hello.

I am finding it very difficult to install matplotlib with snow
leopard. I have the Apple XCODE installed along with numpy (which I
have tested and works) and am running the python 2.6 version that
comes with the Mac.

I have run into the following problems:
1) The diskimage installation: When I open the installer, I am told
that I can not install matplotlib on my disk because I do not have a
system version of python 2.6. I do not understand this error since I
am running the default version (which is 2.6.1).

2) As another person on the list pointed out, easy_install matplotlib
tries to install an older version that does not work with the newer
version of numpy.

3) I downloaded the matplotlib-0.99.1.1-py2.6 egg. I was able to
install matplotlib, seemingly. When I import pylab into python, I do
not get any errors. However, I do get an error when I try to plot.
With the default backend TkAgg (version 8.5), I get the following
error when I try to plot:
_tkinter.TclError: integer value too large to represent

When I try to change the backend to MacOSX, a window opens labeled
Figure 1, but nothing plots. With the verbose level on helpful, I
find only that "backend MacOSX version unknown".

Has anyone seen any of these problems before and have an idea as to
how to fix this? If not, is there another method that I should try
(I'm hesitant to try to build/install from the source).

Thank you for any help!

------------------------------------------------------------------------------
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4

Hi,
To add more information. I am trying this on two separate installs of matplotlib 0.99, both using TkAgg as the backend. One produces an unreadable file, the other does produce a readable EPS. However, even in this case, zooming in on the image shows that what is being saved is bitmapped, not a vector graphic.

Cheers
Mike

Michael Cohen wrote:

···

Hi all,
I made a typical plot, and tried to save it to EPS. The resulting file is un-openable in gimp, the gnome thumbnail viewer, evince, and anything else I have tried.
Is there any problem saving a plot to EPS at the moment?

5

Could you please post some sample code and the EPS it generates, as
well as platform information and any specific rc settings you may
have?

Thanks,
JDH

···

On Wed, Dec 2, 2009 at 3:20 PM, Michael Cohen <mcohen@...256...> wrote:

Hi,
To add more information. I am trying this on two separate installs of
matplotlib 0.99, both using TkAgg as the backend. One produces an
unreadable file, the other does produce a readable EPS. However, even
in this case, zooming in on the image shows that what is being saved is
bitmapped, not a vector graphic.

6

Thanks for the pointers, Bill.

I tried installing from source as you suggested, but I am getting the same errors when I try to plot. What backend are you using?

Here is what I get when I try using TkAgg:

casa98-125-dhcp:.matplotlib lisa$ python simple_plot.py --verbose-helpful
$HOME=/Users/lisa
matplotlib data path /Users/lisa/.local/lib/python2.6/site-packages/matplotlib/mpl-data
loaded rc file /Users/lisa/.matplotlib/matplotlibrc
matplotlib version 0.99.1.1
verbose.level helpful
interactive is True
units is False
platform is darwin
CONFIGDIR=/Users/lisa/.matplotlib
Using fontManager instance from /Users/lisa/.matplotlib/fontList.cache
backend TkAgg version 8.5
Traceback (most recent call last):
   File "simple_plot.py", line 2, in <module>
     plot([1,2,3])
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/pyplot.py", line 2134, in plot
     ax = gca()
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/pyplot.py", line 582, in gca
     ax = gcf().gca(**kwargs)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/pyplot.py", line 276, in gcf
     return figure()
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/pyplot.py", line 254, in figure
     **kwargs)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", line 91, in new_figure_manager
     canvas = FigureCanvasTkAgg(figure, master=window)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/backends/backend_tkagg.py", line 158, in __init__
     master=self._tkcanvas, width=w, height=h)
   File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk/Tkinter.py", line 3284, in __init__
     Image.__init__(self, 'photo', name, cnf, master, **kw)
   File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/lib-tk/Tkinter.py", line 3240, in __init__
     self.tk.call(('image', 'create', imgtype, name,) + options)
_tkinter.TclError: integer value too large to represent

Lisa

···

On Dec 2, 2009, at 2:17 PM, William Carithers wrote:

Hi Lisa,

I had lots of trouble installing on 10.6 as well. What finally worked for me
is to use the (recommended) file make.osx that comes with the matplotlib
download. You have to edit that file to point to the versions of Python (you
want 2.6) and OSX (you want 10.6). I'm attaching a version that has all
these edits already made. (I'm assuming you have an intel Mac, not a ppc).

Look at the top of the file and you will see an example command line that
begins with PREFIX. You'll execute that command line with the example
directory changed to your directory and I highly recommend choosing the
directory /Users/(whatever your user name is)/.local All the libraries will
be installed there and Python will know how to find them even without
explicitly putting them in any PATH variable. This command line will even
check for required dependencies like freetype2, pnglib, ... And will go them
and install them for you if you don't already have them. The command line
should look like:
sudo PREFIX=/Users/(your username)/.local make -f make.osx fetch deps
mpl_install

Good luck,
Bill
On 12/2/09 12:31 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

Hello.

I am finding it very difficult to install matplotlib with snow
leopard. I have the Apple XCODE installed along with numpy (which I
have tested and works) and am running the python 2.6 version that
comes with the Mac.

I have run into the following problems:
1) The diskimage installation: When I open the installer, I am told
that I can not install matplotlib on my disk because I do not have a
system version of python 2.6. I do not understand this error since I
am running the default version (which is 2.6.1).

2) As another person on the list pointed out, easy_install matplotlib
tries to install an older version that does not work with the newer
version of numpy.

3) I downloaded the matplotlib-0.99.1.1-py2.6 egg. I was able to
install matplotlib, seemingly. When I import pylab into python, I do
not get any errors. However, I do get an error when I try to plot.
With the default backend TkAgg (version 8.5), I get the following
error when I try to plot:
_tkinter.TclError: integer value too large to represent

When I try to change the backend to MacOSX, a window opens labeled
Figure 1, but nothing plots. With the verbose level on helpful, I
find only that "backend MacOSX version unknown".

Has anyone seen any of these problems before and have an idea as to
how to fix this? If not, is there another method that I should try
(I'm hesitant to try to build/install from the source).

Thank you for any help!

------------------------------------------------------------------------------
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev
_______________________________________________
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<make.osx>------------------------------------------------------------------------------
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
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7

Hi Lisa,

Hmm. I also use TKAgg with no problems. Looking at your code, it looks like
you are trying the first example in the tutorial. Just to be sure, could you
post/send a full listing of your simple_plot.py?

Thanks,
Bill

···

On 12/2/09 2:01 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

Thanks for the pointers, Bill.

I tried installing from source as you suggested, but I am getting the
same errors when I try to plot. What backend are you using?

Here is what I get when I try using TkAgg:

casa98-125-dhcp:.matplotlib lisa$ python simple_plot.py --verbose-
helpful
$HOME=/Users/lisa
matplotlib data path /Users/lisa/.local/lib/python2.6/site-packages/
matplotlib/mpl-data
loaded rc file /Users/lisa/.matplotlib/matplotlibrc
matplotlib version 0.99.1.1
verbose.level helpful
interactive is True
units is False
platform is darwin
CONFIGDIR=/Users/lisa/.matplotlib
Using fontManager instance from /Users/lisa/.matplotlib/fontList.cache
backend TkAgg version 8.5
Traceback (most recent call last):
   File "simple_plot.py", line 2, in <module>
     plot([1,2,3])
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 2134, in plot
     ax = gca()
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 582, in gca
     ax = gcf().gca(**kwargs)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 276, in gcf
     return figure()
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 254, in figure
     **kwargs)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
backends/backend_tkagg.py", line 91, in new_figure_manager
     canvas = FigureCanvasTkAgg(figure, master=window)
   File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
backends/backend_tkagg.py", line 158, in __init__
     master=self._tkcanvas, width=w, height=h)
   File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/lib-tk/Tkinter.py", line 3284, in __init__
     Image.__init__(self, 'photo', name, cnf, master, **kw)
   File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/lib-tk/Tkinter.py", line 3240, in __init__
     self.tk.call(('image', 'create', imgtype, name,) + options)
_tkinter.TclError: integer value too large to represent

Lisa

On Dec 2, 2009, at 2:17 PM, William Carithers wrote:

Hi Lisa,

I had lots of trouble installing on 10.6 as well. What finally
worked for me
is to use the (recommended) file make.osx that comes with the
matplotlib
download. You have to edit that file to point to the versions of
Python (you
want 2.6) and OSX (you want 10.6). I'm attaching a version that has
all
these edits already made. (I'm assuming you have an intel Mac, not a
ppc).

Look at the top of the file and you will see an example command line
that
begins with PREFIX. You'll execute that command line with the example
directory changed to your directory and I highly recommend choosing
the
directory /Users/(whatever your user name is)/.local All the
libraries will
be installed there and Python will know how to find them even without
explicitly putting them in any PATH variable. This command line will
even
check for required dependencies like freetype2, pnglib, ... And will
go them
and install them for you if you don't already have them. The command
line
should look like:
sudo PREFIX=/Users/(your username)/.local make -f make.osx fetch deps
mpl_install

Good luck,
Bill
On 12/2/09 12:31 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

Hello.

I am finding it very difficult to install matplotlib with snow
leopard. I have the Apple XCODE installed along with numpy (which I
have tested and works) and am running the python 2.6 version that
comes with the Mac.

I have run into the following problems:
1) The diskimage installation: When I open the installer, I am told
that I can not install matplotlib on my disk because I do not have a
system version of python 2.6. I do not understand this error since I
am running the default version (which is 2.6.1).

2) As another person on the list pointed out, easy_install matplotlib
tries to install an older version that does not work with the newer
version of numpy.

3) I downloaded the matplotlib-0.99.1.1-py2.6 egg. I was able to
install matplotlib, seemingly. When I import pylab into python, I do
not get any errors. However, I do get an error when I try to plot.
With the default backend TkAgg (version 8.5), I get the following
error when I try to plot:
_tkinter.TclError: integer value too large to represent

When I try to change the backend to MacOSX, a window opens labeled
Figure 1, but nothing plots. With the verbose level on helpful, I
find only that "backend MacOSX version unknown".

Has anyone seen any of these problems before and have an idea as to
how to fix this? If not, is there another method that I should try
(I'm hesitant to try to build/install from the source).

Thank you for any help!

----------------------------------------------------------------------------
--
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev
_______________________________________________
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matplotlib-users List Signup and Options

<
make.osx

----------------------------------------------------------------------------->>
-

Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev_________________________________________
______
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8

Sure. This is all that it is:

from pylab import *
plot([1,2,3])
show()

···

On Dec 2, 2009, at 3:42 PM, William Carithers wrote:

Hi Lisa,

Hmm. I also use TKAgg with no problems. Looking at your code, it looks like
you are trying the first example in the tutorial. Just to be sure, could you
post/send a full listing of your simple_plot.py?

Thanks,
Bill

On 12/2/09 2:01 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

Thanks for the pointers, Bill.

I tried installing from source as you suggested, but I am getting the
same errors when I try to plot. What backend are you using?

Here is what I get when I try using TkAgg:

casa98-125-dhcp:.matplotlib lisa$ python simple_plot.py --verbose-
helpful
$HOME=/Users/lisa
matplotlib data path /Users/lisa/.local/lib/python2.6/site-packages/
matplotlib/mpl-data
loaded rc file /Users/lisa/.matplotlib/matplotlibrc
matplotlib version 0.99.1.1
verbose.level helpful
interactive is True
units is False
platform is darwin
CONFIGDIR=/Users/lisa/.matplotlib
Using fontManager instance from /Users/lisa/.matplotlib/fontList.cache
backend TkAgg version 8.5
Traceback (most recent call last):
  File "simple_plot.py", line 2, in <module>
    plot([1,2,3])
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 2134, in plot
    ax = gca()
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 582, in gca
    ax = gcf().gca(**kwargs)
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 276, in gcf
    return figure()
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
pyplot.py", line 254, in figure
    **kwargs)
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
backends/backend_tkagg.py", line 91, in new_figure_manager
    canvas = FigureCanvasTkAgg(figure, master=window)
  File "/Users/lisa/.local/lib/python2.6/site-packages/matplotlib/
backends/backend_tkagg.py", line 158, in __init__
    master=self._tkcanvas, width=w, height=h)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/lib-tk/Tkinter.py", line 3284, in __init__
    Image.__init__(self, 'photo', name, cnf, master, **kw)
  File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/
python2.6/lib-tk/Tkinter.py", line 3240, in __init__
    self.tk.call(('image', 'create', imgtype, name,) + options)
_tkinter.TclError: integer value too large to represent

Lisa

On Dec 2, 2009, at 2:17 PM, William Carithers wrote:

Hi Lisa,

I had lots of trouble installing on 10.6 as well. What finally
worked for me
is to use the (recommended) file make.osx that comes with the
matplotlib
download. You have to edit that file to point to the versions of
Python (you
want 2.6) and OSX (you want 10.6). I'm attaching a version that has
all
these edits already made. (I'm assuming you have an intel Mac, not a
ppc).

Look at the top of the file and you will see an example command line
that
begins with PREFIX. You'll execute that command line with the example
directory changed to your directory and I highly recommend choosing
the
directory /Users/(whatever your user name is)/.local All the
libraries will
be installed there and Python will know how to find them even without
explicitly putting them in any PATH variable. This command line will
even
check for required dependencies like freetype2, pnglib, ... And will
go them
and install them for you if you don't already have them. The command
line
should look like:
sudo PREFIX=/Users/(your username)/.local make -f make.osx fetch deps
mpl_install

Good luck,
Bill
On 12/2/09 12:31 PM, "Lisa M Winter" <Lisa.Winter@...2890...> >>> wrote:

Hello.

I am finding it very difficult to install matplotlib with snow
leopard. I have the Apple XCODE installed along with numpy (which I
have tested and works) and am running the python 2.6 version that
comes with the Mac.

I have run into the following problems:
1) The diskimage installation: When I open the installer, I am told
that I can not install matplotlib on my disk because I do not have a
system version of python 2.6. I do not understand this error since I
am running the default version (which is 2.6.1).

2) As another person on the list pointed out, easy_install matplotlib
tries to install an older version that does not work with the newer
version of numpy.

3) I downloaded the matplotlib-0.99.1.1-py2.6 egg. I was able to
install matplotlib, seemingly. When I import pylab into python, I do
not get any errors. However, I do get an error when I try to plot.
With the default backend TkAgg (version 8.5), I get the following
error when I try to plot:
_tkinter.TclError: integer value too large to represent

When I try to change the backend to MacOSX, a window opens labeled
Figure 1, but nothing plots. With the verbose level on helpful, I
find only that "backend MacOSX version unknown".

Has anyone seen any of these problems before and have an idea as to
how to fix this? If not, is there another method that I should try
(I'm hesitant to try to build/install from the source).

Thank you for any help!

----------------------------------------------------------------------------
--
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options

<
make.osx

----------------------------------------------------------------------------->>
-

Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing.
Attend in-depth sessions from your desk. Your couch. Anywhere.
http://p.sf.net/sfu/redhat-sfdev2dev_________________________________________
______
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matplotlib-users List Signup and Options

------------------------------------------------------------------------------
Join us December 9, 2009 for the Red Hat Virtual Experience,
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9

You're right--that's pretty simple. I ran that exact code and it worked
fine.

Don't know what to say except that this is above my competence level to dig
into the guts of tk. Looks like a problem for John Hunter.

Sorry I couldn't help more,
Bill

···

On 12/2/09 2:49 PM, "Lisa M Winter" <Lisa.Winter@...2890...> wrote:

from pylab import *
plot([1,2,3])
show()

10

Lisa M Winter wrote:

1) The diskimage installation: When I open the installer, I am told that I can not install matplotlib on my disk because I do not have a system version of python 2.6. I do not understand this error since I am running the default version (which is 2.6.1).

The diskimage is usually built for the python binary supplied by python.org -- that is what the message means by the "system version". I tried to submit a patch to change that message a year or two ago, but I guess it never got applied -- maybe I'll try again.

A note to developers/distributors:

Robin Dunn figured out a way to install a binary wxPython that will work with both the Apple and the python.org binaries. What it does it put it in /usr/local, and then put a pth file in both of the pythons so that it can be found. A bit of a hack, but it works, and I've never heard anyone have a problem with it.

Perhaps we should do the same thing with MPL -- I'm sure he'd be glad to share his scripts for building it.

-Chris

···

--
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception

Chris.Barker@...259...

11

Christopher Barker wrote:

The diskimage is usually built for the python binary supplied by python.org -- that is what the message means by the "system version". I tried to submit a patch to change that message a year or two ago, but I guess it never got applied -- maybe I'll try again.

I took a look at the source for the latest bdist_mpkg -- it looks like it should now give a message like:

"This package requires MacPython to be installed"

though It's all a bit complicated -- did whoever built the dmg use the latest bdist_mpkg?

But maybe should still do:

A note to developers/distributors:

Robin Dunn figured out a way to install a binary wxPython that will work with both the Apple and the python.org binaries. What it does it put it in /usr/local, and then put a pth file in both of the pythons so that it can be found. A bit of a hack, but it works, and I've never heard anyone have a problem with it.

Perhaps we should do the same thing with MPL -- I'm sure he'd be glad to share his scripts for building it.

-Chris

···

--
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R (206) 526-6959 voice
7600 Sand Point Way NE (206) 526-6329 fax
Seattle, WA 98115 (206) 526-6317 main reception

Chris.Barker@...259...

12

Hi,

Sorry for taking a few days to reply.
Basic system information

uname \-a Linux shc\-b 2\.6\.18\-128\.1\.10\.el5 \#1 SMP Wed Apr 29 13:53:08 EDT 2009 x86\_64 x86\_64 x86\_64 GNU/Linux head -n1 /etc/issue
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
$

matplotlibrc attached.

plot_test.py attached also.

$ python
Python 2.6.2 (r262:71600, Sep 16 2009, 13:37:23)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> print matplotlib.__version__
0.99.0
>>>

finally, failed output eps also attached.

The plot generates a set of horizontal and vertical lines to make a grid, and then applies the Mollweide projection to give latitude and longitude lines.
For some reason, not running the projection (i.e. lines 43-51 in the python script) gives a file that outputs as a nice eps. If you do keep the Mollweide projection in, you still generate a lovely plot, but the savefig to .eps fails.

Thanks,
Michael

John Hunter wrote:

matplotlibrc (17.5 KB)

plot_test.py (1.72 KB)

test.eps (28.1 KB)

···

On Wed, Dec 2, 2009 at 3:20 PM, Michael Cohen <mcohen@...256...> wrote:

Hi,
To add more information. I am trying this on two separate installs of
matplotlib 0.99, both using TkAgg as the backend. One produces an
unreadable file, the other does produce a readable EPS. However, even
in this case, zooming in on the image shows that what is being saved is
bitmapped, not a vector graphic.

Could you please post some sample code and the EPS it generates, as
well as platform information and any specific rc settings you may
have?

Thanks,
JDH

13

Hi there,
Does anyone know what might be the problem with this EPS write?
Please see my email of Dec 6th for the attachments.

Regards,
Michael

Michael Cohen wrote:

···

Hi,

Sorry for taking a few days to reply.
Basic system information

uname \-a Linux shc\-b 2\.6\.18\-128\.1\.10\.el5 \#1 SMP Wed Apr 29 13:53:08 EDT 2009 x86\_64 x86\_64 x86\_64 GNU/Linux head -n1 /etc/issue
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
$

matplotlibrc attached.

plot_test.py attached also.

$ python
Python 2.6.2 (r262:71600, Sep 16 2009, 13:37:23)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> print matplotlib.__version__
0.99.0
>>>

finally, failed output eps also attached.

The plot generates a set of horizontal and vertical lines to make a grid, and then applies the Mollweide projection to give latitude and longitude lines.
For some reason, not running the projection (i.e. lines 43-51 in the python script) gives a file that outputs as a nice eps. If you do keep the Mollweide projection in, you still generate a lovely plot, but the savefig to .eps fails.

Thanks,
Michael

John Hunter wrote:

On Wed, Dec 2, 2009 at 3:20 PM, Michael Cohen <mcohen@...256...> wrote:

Hi,
To add more information. I am trying this on two separate installs of
matplotlib 0.99, both using TkAgg as the backend. One produces an
unreadable file, the other does produce a readable EPS. However, even
in this case, zooming in on the image shows that what is being saved is
bitmapped, not a vector graphic.

Could you please post some sample code and the EPS it generates, as
well as platform information and any specific rc settings you may
have?

Thanks,
JDH

14

I can confirm this bug on matplotlib-0.99.0, and 0.99.1.2, but not on SVN head. I think this is related to a recently fixed bug involving the renderer outputting single-point lines (which obviously doesn't make sense, and Postscript has problems with).

You can either install from SVN (I recommend using the 0.99.x branch [1], rather than the trunk), or set the rcParam 'path.simplify' to False. Unfortunately, the latter will result in some very large file sizes.

[1] https://matplotlib.svn.sf.net/svnroot/matplotlib/branches/v0_99_maint

Cheers,
Mike

Michael Cohen wrote:

···

Hi there,
Does anyone know what might be the problem with this EPS write?
Please see my email of Dec 6th for the attachments.

Regards,
Michael

Michael Cohen wrote:
  

Hi,

Sorry for taking a few days to reply.
Basic system information

uname \-a Linux shc\-b 2\.6\.18\-128\.1\.10\.el5 \#1 SMP Wed Apr 29 13:53:08 EDT 2009 x86\_64 x86\_64 x86\_64 GNU/Linux head -n1 /etc/issue
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
$

matplotlibrc attached.

plot_test.py attached also.

$ python
Python 2.6.2 (r262:71600, Sep 16 2009, 13:37:23)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> print matplotlib.__version__
0.99.0
>>>

finally, failed output eps also attached.

The plot generates a set of horizontal and vertical lines to make a grid, and then applies the Mollweide projection to give latitude and longitude lines.
For some reason, not running the projection (i.e. lines 43-51 in the python script) gives a file that outputs as a nice eps. If you do keep the Mollweide projection in, you still generate a lovely plot, but the savefig to .eps fails.

Thanks,
Michael

John Hunter wrote:
    

On Wed, Dec 2, 2009 at 3:20 PM, Michael Cohen <mcohen@...256...> wrote:
      

Hi,
To add more information. I am trying this on two separate installs of
matplotlib 0.99, both using TkAgg as the backend. One produces an
unreadable file, the other does produce a readable EPS. However, even
in this case, zooming in on the image shows that what is being saved is
bitmapped, not a vector graphic.
        

Could you please post some sample code and the EPS it generates, as
well as platform information and any specific rc settings you may
have?

Thanks,
JDH
      
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--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

15

Thanks, the svn version is working nicely.

Cheers
Mike

···

On 12/09/2009 01:21 PM, Michael Droettboom wrote:

I can confirm this bug on matplotlib-0.99.0, and 0.99.1.2, but not on
SVN head. I think this is related to a recently fixed bug involving the
renderer outputting single-point lines (which obviously doesn't make
sense, and Postscript has problems with).

You can either install from SVN (I recommend using the 0.99.x branch
[1], rather than the trunk), or set the rcParam 'path.simplify' to
False. Unfortunately, the latter will result in some very large file sizes.

[1] https://matplotlib.svn.sf.net/svnroot/matplotlib/branches/v0_99_maint

Cheers,
Mike

Michael Cohen wrote:

Hi there,
Does anyone know what might be the problem with this EPS write?
Please see my email of Dec 6th for the attachments.

Regards,
Michael

Michael Cohen wrote:

Hi,

Sorry for taking a few days to reply.
Basic system information

uname \-a Linux shc\-b 2\.6\.18\-128\.1\.10\.el5 \#1 SMP Wed Apr 29 13:53:08 EDT 2009 x86\_64 x86\_64 x86\_64 GNU/Linux head -n1 /etc/issue
Red Hat Enterprise Linux Server release 5.3 (Tikanga)
$

matplotlibrc attached.

plot_test.py attached also.

$ python
Python 2.6.2 (r262:71600, Sep 16 2009, 13:37:23)
[GCC 4.1.2 20080704 (Red Hat 4.1.2-44)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import matplotlib
>>> print matplotlib.__version__
0.99.0
>>>

finally, failed output eps also attached.

The plot generates a set of horizontal and vertical lines to make a
grid, and then applies the Mollweide projection to give latitude and
longitude lines.
For some reason, not running the projection (i.e. lines 43-51 in the
python script) gives a file that outputs as a nice eps. If you do
keep the Mollweide projection in, you still generate a lovely plot,
but the savefig to .eps fails.

Thanks,
Michael

John Hunter wrote:

On Wed, Dec 2, 2009 at 3:20 PM, Michael Cohen <mcohen@...256...> >>>> wrote:

Hi,
To add more information. I am trying this on two separate installs of
matplotlib 0.99, both using TkAgg as the backend. One produces an
unreadable file, the other does produce a readable EPS. However, even
in this case, zooming in on the image shows that what is being
saved is
bitmapped, not a vector graphic.

Could you please post some sample code and the EPS it generates, as
well as platform information and any specific rc settings you may
have?

Thanks,
JDH

------------------------------------------------------------------------------

Return on Information:
Google Enterprise Search pays you back
Get the facts.
http://p.sf.net/sfu/google-dev2dev
_______________________________________________
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
matplotlib-users List Signup and Options