Re: [Matplotlib-users] histogram examples?
On Tue, Nov 11, 2008 at 07:13:46AM -1000, Eric Firing wrote: > Michael Hannon wrote: > >Greetings. I need to make some histograms from within a Python program, > >and I noticed that Matplotlib, which I've never used before, appears to > >have that capability. > > > >At: > >http://matplotlib.sourceforge.net/ > > > >I see the following simple example: > > > >>>> from pylab import randn, hist > >>>> x = randn(1) > >>>> hist(x, 100) > > > >And there is a more-extended example at: > > > >http://matplotlib.sourceforge.net/_static/plot_directive/mpl_examples/pylab_examples/histogram_demo.py > > > >Unfortunately, when I run either example I get nothing but complaints > >and errors, as in the appended. > > > >This is on a system running 64-bit Fedora 9 and Python 2.5.1. > > > >I'm evidently doing something wrong. Will somebody please point me in > >the right direction? > > > It sounds like your matplotlib version is too old for your numpy > version. What version of matplotlib are you using? Can you install a > newer one, or, better yet, build from svn? (The warning from numpy is > easy to deal with; the TypeError from matplotlib is what indicates that > the version is incompatible.) > > Eric Hi, Eric. I'm using the packages provided by Fedora: numpy.x86_64 1.2.0-1.fc9 python-matplotlib.x86_64 0.91.4-1.fc9 It appears that numpy is reasonably up-to-date, but Matplotlib appears to be relatively old (although I don't know what d(version)/dt is). I'll look into installing from the source kits (and/or look into Fedora 10, which will be shipping in a couple of weeks, IIRC). Thanks. - Mike -- Michael Hannonmailto:[EMAIL PROTECTED] Dept. of Physics 530.752.4966 University of California 530.752.4717 FAX Davis, CA 95616-8677 - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] histogram examples?
Greetings. I need to make some histograms from within a Python program, and I noticed that Matplotlib, which I've never used before, appears to have that capability. At: http://matplotlib.sourceforge.net/ I see the following simple example: >>> from pylab import randn, hist >>> x = randn(1) >>> hist(x, 100) And there is a more-extended example at: http://matplotlib.sourceforge.net/_static/plot_directive/mpl_examples/pylab_examples/histogram_demo.py Unfortunately, when I run either example I get nothing but complaints and errors, as in the appended. This is on a system running 64-bit Fedora 9 and Python 2.5.1. I'm evidently doing something wrong. Will somebody please point me in the right direction? Thanks. - Mike $ python Python 2.5.1 (r251:54863, Jun 15 2008, 18:24:56) [GCC 4.3.0 20080428 (Red Hat 4.3.0-8)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> from pylab import randn, hist >>> x = randn(1) >>> hist(x, 100) /usr/lib64/python2.5/site-packages/numpy/lib/function_base.py:343: Warning: The semantics of histogram has been modified in the current release to fix long-standing issues with outliers handling. The main changes concern 1. the definition of the bin edges, now including the rightmost edge, and 2. the handling of upper outliers, now ignored rather than tallied in the rightmost bin. The previous behaviour is still accessible using `new=False`, but is scheduled to be deprecated in the next release (1.3). *This warning will not printed in the 1.3 release.* Use `new=True` to bypass this warning. Please read the docstring for more information. """, Warning) Traceback (most recent call last): File "", line 1, in File "/usr/lib64/python2.5/site-packages/matplotlib/pyplot.py", line 1633, in hist ret = gca().hist(*args, **kwargs) File "/usr/lib64/python2.5/site-packages/matplotlib/axes.py", line 5117, in hist n, bins = npy.histogram(x, bins, range=None, normed=normed) TypeError: 'NoneType' object is not iterable -- Michael Hannonmailto:[EMAIL PROTECTED] Dept. of Physics 530.752.4966 University of California 530.752.4717 FAX Davis, CA 95616-8677 - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] histogram examples?
On Tue, Nov 11, 2008 at 08:52:15AM -1000, Eric Firing wrote: . . . > >Hi, Eric. I'm using the packages provided by Fedora: > > > >numpy.x86_64 1.2.0-1.fc9 > >python-matplotlib.x86_64 0.91.4-1.fc9 > > > >It appears that numpy is reasonably up-to-date, but Matplotlib appears > >to be relatively old (although I don't know what d(version)/dt is). > > Yes, your numpy is fine, but your matplotlib is an older branch, and > although it is still being maintained it looks like it is not in sync > with changes to numpy going from 1.1 to 1.2. I hope Fedora 10 has > switched to the current branch, 0.98.x. In any case, however, > matplotlib changes fast enough that it may be worthwhile building your > own. It is very easy to do on a linux machine once the necessary > headers are in place. Typically this involves installing several *dev > or *devel packages--I don't know the specifics of Fedora packaging. Thanks again, Eric. I built Matplotlib 0.98 from source on my Fedora box, and that did fix the problem. I haven't checked Fedora 10 yet (arriving in 13 days). - Mike -- Michael Hannonmailto:[EMAIL PROTECTED] Dept. of Physics 530.752.4966 University of California 530.752.4717 FAX Davis, CA 95616-8677 - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Problem getting math symbols into text
Greetings. I'm unable to get mathtext to work properly on my linux system: # cat /etc/redhat-release Fedora release 13 (Goddard) # uname -a Linux localhost.localdomain 2.6.33.6-147.2.4.fc13.x86_64 #1 SMP Fri Jul 23 17:14:44 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux The problem is essentially identical to one that is described in the thread at: http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg09208.html I didn't see a real resolution to the problem in that thread, at least not one that applied to me. In brief, when I specify a math symbol in a text string, say: r'$\pi$' I get some "random" character (capital A in this case) at the place where I'm supposed to see the Greek letter Pi. Furthermore, if I try to coerce the use of the Greek letters by setting "text.markup" to "tex", either interactively or in the rc file, I get an error saying that it's not a valid parameter: Bad key "text.markup" on line 161 in ... matplotlibrc for instance. This is followed by the message: You probably need to get an updated matplotlibrc file from http://matplotlib.sf.net/_static/matplotlibrc or from the matplotlib source distribution But the file at that link still contains: #text.markup:'plain' # Affects how text, such as titles and labels, are # interpreted by default. # 'plain': As plain, unformatted text # 'tex': As TeX-like text. Text between $'s # will be # formatted as a TeX math expression. # This setting has no effect when text.usetex # is True. # In that case, all text will be sent to TeX # for # processing. I don't know what to make of this. I did the following to try to pin down the parameters: import matplotlib as mpl import pprint x = mpl.rcParams.keys() x.sort() pprint.pprint(x) This produced: . . . 'svg.image_noscale', 'text.color', 'text.dvipnghack', 'text.fontangle', 'text.fontsize', 'text.fontstyle', 'text.fontvariant', 'text.fontweight', 'text.latex.preamble', 'text.latex.preview', 'text.latex.unicode', 'text.usetex', 'timezone', . . . Indeed, there does not seem to be a "text.markup" in this list. I have tried this both with and without an rc file, and I've tried it after deleting completely my .matplotlib directory. I get the same results in all cases. OTOH, if I set: text.usetex to "True", I do get the expected mathematical symbols, albeit after a noticeable delay. I've got the following two matplotlib packages installed: python-matplotlib-0.99.1.2-4.fc13.x86_64 python-matplotlib-tk-0.99.1.2-4.fc13.x86_64 and the system is running Python 2.6.4. Any suggestions? Maybe I'm missing a package? Thanks. -- Mike -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Problem getting math symbols into text
> Wow, I hadn't realized that Fedora 13 is carrying a rather old version of > matplotlib (~2 years old). I should double-check what version is in rawhide > and possibly prod some people to get them to choose a more recent version... Hi, Ben. I think it would be a good idea to give the Fedora people some feedback on this. I thought that one of the main points of Fedora was to explore bleeding-edge software. > I am not exactly sure what the cause of your problem is, but you could try > uninstalling the Fedora packages of matplotlib and install the latest > version from source. Unless someone else has a better idea about what the > cause of the problem is? I'm usually reluctant to do this, as the packages installed from source don't automatically get security updates, etc., but I tried your suggestion and found the exercise painless. And with the new version I DO get math symbols on my plots. Thanks for your help with this. -- Mike -- The Palm PDK Hot Apps Program offers developers who use the Plug-In Development Kit to bring their C/C++ apps to Palm for a share of $1 Million in cash or HP Products. Visit us here for more details: http://p.sf.net/sfu/dev2dev-palm___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Problem getting math symbols into text
- Original Message > From: Michael Droettboom > To: Michael Hannon ; >matplotlib-users@lists.sourceforge.net > Sent: Thu, August 5, 2010 6:24:58 AM > Subject: Re: [Matplotlib-users] Problem getting math symbols into text > It looks like you're configured for the STIX fonts (the rcParam > mathtext.fontset = stix), but they are not installed on your system. > > Do you have the file "STIXGeneral.ttf" on your system? Perhaps you need to > install an additional package. Hi, Mike. I've thrashed around a bit more with this. It appears that if I use the matplotlib from Fedora 13 (version 0.99) I get the correct behavior for math text if I also install the stix* packages AND set rcParams[mathtext.fontset] to "stix". (There are four stix packages in Fedora 13, all small, and I just installed all of them, so I don't know what the minimum requirement is). I also got the appropriate math text when I installed the latest matplotlib from source and used all the default settings. I've now reverted to the standard Fedora packages and stix, so I can't easily compare the two sets of rcParams. Thanks for your help. -- Mike -- This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
