matplotlib-devel Mailing List for matplotlib

Travis,
That sounds like a good solution, thanks. A change in either or both of 
contour.py and cntr.c will still be needed, because cntr.c is checking 
for Py_None.
If you want to do it, fine; otherwise I can do it this evening or 
tomorrow morning.
Eric
Travis Oliphant wrote:
> Eric Firing wrote:
> 
>>
>> I remember seeing some discussion of this, but I did not pay enough 
>> attention to it. If it turns out that returning False is a good idea 
>> in general, then I think it will be easy to modify the mpl code to 
>> handle that, and I don't mind doing it. Just let me know what the 
>> outcome is.
> 
> 
> I've committed a change to matplotlib that should fix this. Basically, 
> the check is changed to "mask is not ma.nomask" (defined in numpy and 
> which I defined in the numerix.ma module for numarray and Numeric to be 
> None).
> 
> I think this should fix the problem and be more future-proof.
> 
> -Travis
> 
> 
> 
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Eric Firing wrote:
>
> I remember seeing some discussion of this, but I did not pay enough 
> attention to it. If it turns out that returning False is a good idea 
> in general, then I think it will be easy to modify the mpl code to 
> handle that, and I don't mind doing it. Just let me know what the 
> outcome is.
I've committed a change to matplotlib that should fix this. Basically, 
the check is changed to "mask is not ma.nomask" (defined in numpy and 
which I defined in the numerix.ma module for numarray and Numeric to be 
None).
I think this should fix the problem and be more future-proof.
-Travis

Travis Oliphant wrote:
> Eric Firing wrote:
> 
>> Darren,
>>
>> I just tried it with (numpy imported as n)
>> In [23]:n.__version__
>> Out[23]:'0.9.4.1914'
>>
>> and I don't get the error. Are you using a newer version of numpy?
> 
> 
> 
> This is a problem with masked arrays in the newer version of numpy. 
> Someone is doing a lot of work on masked arrays and probably not aware 
> of their use in matplotlib. Recently, for example, the return type for 
> no mask was changed from None to False (I'm not sure why...I'm asking 
> him right now). That is causing the problem because there is a check 
> for None in the matplotlib code (but not for False...). We'll get this 
> cleared up, thanks for the report...
Travis,
I remember seeing some discussion of this, but I did not pay enough 
attention to it. If it turns out that returning False is a good idea in 
general, then I think it will be easy to modify the mpl code to handle 
that, and I don't mind doing it. Just let me know what the outcome is.
Eric

Eric Firing wrote:
> Darren,
>
> I just tried it with (numpy imported as n)
> In [23]:n.__version__
> Out[23]:'0.9.4.1914'
>
> and I don't get the error. Are you using a newer version of numpy?
This is a problem with masked arrays in the newer version of numpy. 
Someone is doing a lot of work on masked arrays and probably not aware 
of their use in matplotlib. Recently, for example, the return type for 
no mask was changed from None to False (I'm not sure why...I'm asking 
him right now). That is causing the problem because there is a check 
for None in the matplotlib code (but not for False...). We'll get this 
cleared up, thanks for the report...
-Travis

Darren,
I just tried it with (numpy imported as n)
In [23]:n.__version__
Out[23]:'0.9.4.1914'
and I don't get the error. Are you using a newer version of numpy?
Eric
Darren Dale wrote:
> I just updated this morning, and the following script fails:
> 
> import pylab as pl
> pl.plot(xrange(10), xrange(10))
> 
> 
> Here's the traceback:
> 
> ---------------------------------------------------------------------------
> exceptions.ValueError Traceback (most recent 
> call last)
> 
> /home/darren/<ipython console>
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
> in plot(*args, **kwargs)
> 2077 def plot(*args, **kwargs):
> 2078 # allow callers to override the hold state by passing hold=True|
> False
> -> 2079 b = ishold()
> 2080 h = popd(kwargs, 'hold', None)
> 2081 if h is not None:
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
> in ishold()
> 938 Return the hold status of the current axes
> 939 """
> --> 940 return gca().ishold()
> 941
> 942 def isinteractive():
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
> in gca(**kwargs)
> 889 """
> 890
> --> 891 ax = gcf().gca(**kwargs)
> 892 return ax
> 893
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/figure.py 
> in gca(self, **kwargs)
> 613 ax = self._axstack()
> 614 if ax is not None: return ax
> --> 615 return self.add_subplot(111, **kwargs)
> 616
> 617 def sca(self, a):
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/figure.py 
> in add_subplot(self, *args, **kwargs)
> 463 a = PolarSubplot(self, *args, **kwargs)
> 464 else:
> --> 465 a = Subplot(self, *args, **kwargs)
> 466
> 467
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
> in __init__(self, fig, *args, **kwargs)
> 4094 def __init__(self, fig, *args, **kwargs):
> 4095 SubplotBase.__init__(self, fig, *args)
> -> 4096 Axes.__init__(self, fig, [self.figLeft, self.figBottom,
> 4097 self.figW, self.figH], **kwargs)
> 4098
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
> in __init__(self, fig, rect, axisbg, frameon, sharex, sharey, label, 
> **kwargs)
> 329
> 330 # this call may differ for non-sep axes, eg polar
> --> 331 self._init_axis()
> 332
> 333
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
> in _init_axis(self)
> 358 def _init_axis(self):
> 359 "move this out of __init__ because non-separable axes don't 
> use it"
> --> 360 self.xaxis = XAxis(self)
> 361 self.yaxis = YAxis(self)
> 362
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
> in __init__(self, axes)
> 499 self.minorTicks = []
> 500
> --> 501 self.cla()
> 502
> 503 def cla(self):
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
> in cla(self)
> 522 popall(self.minorTicks)
> 523
> --> 524 self.majorTicks.extend([self._get_tick(major=True) for i in 
> range(1)])
> 525 self.minorTicks.extend([self._get_tick(major=False) for i in 
> range(1)])
> 526
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
> in _get_tick(self, major)
> 832
> 833 def _get_tick(self, major):
> --> 834 return XTick(self.axes, 0, '', major=major)
> 835
> 836 def _get_label(self):
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
> in __init__(self, axes, loc, label, size, gridOn, tick1On, tick2On, label1On, 
> label2On, major)
> 98
> 99
> --> 100 self.tick1line = self._get_tick1line(loc)
> 101 self.tick2line = self._get_tick2line(loc)
> 102 self.gridline = self._get_gridline(loc)
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
> in _get_tick1line(self, loc)
> 274 antialiased=False,
> 275 marker = self._xtickmarkers[0],
> --> 276 markersize=self._size,
> 277 )
> 278
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
> in __init__(self, xdata, ydata, linewidth, linestyle, color, marker, 
> markersize, markeredgewidth, markeredgecolor, markerfacecolor, antialiased, 
> dash_capstyle, solid_capstyle, dash_joinstyle, solid_joinstyle, **kwargs)
> 209 self.verticalOffset = None
> 210
> --> 211 self.set_data(xdata, ydata)
> 212
> 213 if not self._lineStyles.has_key(linestyle):
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
> in set_data(self, *args)
> 280 x = ma.masked_array(x, mask=mask).compressed()
> 281 y = ma.masked_array(y, mask=mask).compressed()
> --> 282 self._segments = unmasked_index_ranges(mask)
> 283 else:
> 284 self._segments = None
> 
> /usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
> in unmasked_index_ranges(mask, compressed)
> 67
> 68 '''
> ---> 69 m = concatenate(((1,), mask, (1,)))
> 70 indices = arange(len(mask) + 1)
> 71 mdif = m[1:] - m[:-1]
> 
> ValueError: arrays must have same number of dimensions
> 
> 
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>>>>> "Darren" == Darren Dale <dd...@co...> writes:
 Darren> I just updated this morning, and the following script
 Darren> fails: import pylab as pl pl.plot(xrange(10), xrange(10))
I'm not seeing this with numpy, numarray or Numeric. My guess is that
it is a numpy incompatibility. What version are you using?
peds-pc311:~> python test.py --Numeric --verbose-helpful
matplotlib data path /usr/lib/python2.4/site-packages/matplotlib/mpl-data
$HOME=/home/jdhunter
CONFIGDIR=/home/jdhunter/.matplotlib
loaded rc file /home/jdhunter/.matplotlib/matplotlibrc
matplotlib version 0.86.2cvs
verbose.level helpful
interactive is False
platform is linux2
numerix Numeric 24.0b2
font search path ['/usr/lib/python2.4/site-packages/matplotlib/mpl-data']
loaded ttfcache file /home/jdhunter/.matplotlib/ttffont.cache
backend TkAgg version 8.4
peds-pc311:~> python test.py --numarray --verbose-helpful
matplotlib data path /usr/lib/python2.4/site-packages/matplotlib/mpl-data
$HOME=/home/jdhunter
CONFIGDIR=/home/jdhunter/.matplotlib
loaded rc file /home/jdhunter/.matplotlib/matplotlibrc
matplotlib version 0.86.2cvs
verbose.level helpful
interactive is False
platform is linux2
numerix numarray 1.3.3
font search path ['/usr/lib/python2.4/site-packages/matplotlib/mpl-data']
loaded ttfcache file /home/jdhunter/.matplotlib/ttffont.cache
backend TkAgg version 8.4
peds-pc311:~> python test.py --numpy --verbose-helpful
matplotlib data path /usr/lib/python2.4/site-packages/matplotlib/mpl-data
$HOME=/home/jdhunter
CONFIGDIR=/home/jdhunter/.matplotlib
loaded rc file /home/jdhunter/.matplotlib/matplotlibrc
matplotlib version 0.86.2cvs
verbose.level helpful
interactive is False
platform is linux2
numerix numpy 0.9.2
font search path ['/usr/lib/python2.4/site-packages/matplotlib/mpl-data']
loaded ttfcache file /home/jdhunter/.matplotlib/ttffont.cache
backend TkAgg version 8.4
peds-pc311:~> 

I just updated this morning, and the following script fails:
import pylab as pl
pl.plot(xrange(10), xrange(10))
Here's the traceback:
---------------------------------------------------------------------------
exceptions.ValueError Traceback (most recent 
call last)
/home/darren/<ipython console>
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
in plot(*args, **kwargs)
 2077 def plot(*args, **kwargs):
 2078 # allow callers to override the hold state by passing hold=True|
False
-> 2079 b = ishold()
 2080 h = popd(kwargs, 'hold', None)
 2081 if h is not None:
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
in ishold()
 938 Return the hold status of the current axes
 939 """
--> 940 return gca().ishold()
 941
 942 def isinteractive():
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/pylab.py 
in gca(**kwargs)
 889 """
 890
--> 891 ax = gcf().gca(**kwargs)
 892 return ax
 893
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/figure.py 
in gca(self, **kwargs)
 613 ax = self._axstack()
 614 if ax is not None: return ax
--> 615 return self.add_subplot(111, **kwargs)
 616
 617 def sca(self, a):
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/figure.py 
in add_subplot(self, *args, **kwargs)
 463 a = PolarSubplot(self, *args, **kwargs)
 464 else:
--> 465 a = Subplot(self, *args, **kwargs)
 466
 467
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
in __init__(self, fig, *args, **kwargs)
 4094 def __init__(self, fig, *args, **kwargs):
 4095 SubplotBase.__init__(self, fig, *args)
-> 4096 Axes.__init__(self, fig, [self.figLeft, self.figBottom,
 4097 self.figW, self.figH], **kwargs)
 4098
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
in __init__(self, fig, rect, axisbg, frameon, sharex, sharey, label, 
**kwargs)
 329
 330 # this call may differ for non-sep axes, eg polar
--> 331 self._init_axis()
 332
 333
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axes.py 
in _init_axis(self)
 358 def _init_axis(self):
 359 "move this out of __init__ because non-separable axes don't 
use it"
--> 360 self.xaxis = XAxis(self)
 361 self.yaxis = YAxis(self)
 362
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
in __init__(self, axes)
 499 self.minorTicks = []
 500
--> 501 self.cla()
 502
 503 def cla(self):
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
in cla(self)
 522 popall(self.minorTicks)
 523
--> 524 self.majorTicks.extend([self._get_tick(major=True) for i in 
range(1)])
 525 self.minorTicks.extend([self._get_tick(major=False) for i in 
range(1)])
 526
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
in _get_tick(self, major)
 832
 833 def _get_tick(self, major):
--> 834 return XTick(self.axes, 0, '', major=major)
 835
 836 def _get_label(self):
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
in __init__(self, axes, loc, label, size, gridOn, tick1On, tick2On, label1On, 
label2On, major)
 98
 99
--> 100 self.tick1line = self._get_tick1line(loc)
 101 self.tick2line = self._get_tick2line(loc)
 102 self.gridline = self._get_gridline(loc)
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/axis.py 
in _get_tick1line(self, loc)
 274 antialiased=False,
 275 marker = self._xtickmarkers[0],
--> 276 markersize=self._size,
 277 )
 278
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
in __init__(self, xdata, ydata, linewidth, linestyle, color, marker, 
markersize, markeredgewidth, markeredgecolor, markerfacecolor, antialiased, 
dash_capstyle, solid_capstyle, dash_joinstyle, solid_joinstyle, **kwargs)
 209 self.verticalOffset = None
 210
--> 211 self.set_data(xdata, ydata)
 212
 213 if not self._lineStyles.has_key(linestyle):
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
in set_data(self, *args)
 280 x = ma.masked_array(x, mask=mask).compressed()
 281 y = ma.masked_array(y, mask=mask).compressed()
--> 282 self._segments = unmasked_index_ranges(mask)
 283 else:
 284 self._segments = None
/usr/lib64/python2.4/site-packages/matplotlib-0.86.2cvs-py2.4-linux-x86_64.egg/matplotlib/lines.py 
in unmasked_index_ranges(mask, compressed)
 67
 68 '''
---> 69 m = concatenate(((1,), mask, (1,)))
 70 indices = arange(len(mask) + 1)
 71 mdif = m[1:] - m[:-1]
ValueError: arrays must have same number of dimensions