Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread Ted To 
On 02/08/2012 11:28 AM, John Hunter wrote:
> 
> OK, here is where the problem is.  In the plt.axis call you are setting
> the x-axis min to 0 which is not a legal date value.  I suggest letting
> the x-axis take care of itself, and set the y-axis limits with 
> 
> plt.ylim(-1.5, 1.5)
> 
> JDH 

Many thanks!  I also had to move the axhline commands to follow the
other plotting commands.

Ted

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Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread John Hunter 
On Wed, Feb 8, 2012 at 10:24 AM, Ted To  wrote:

> On 02/08/2012 11:17 AM, John Hunter wrote:
> >
> >
> > On Wed, Feb 8, 2012 at 10:06 AM, Ted To  > > wrote:
> >
> > If it hasn't been fixed, is there a workaround?
> >
> > On 02/08/2012 10:42 AM, Ted To wrote:
> > > I believe I have traced it to some axhline and axis commands and
> > this is
> > > apparently an old problem.  Does it work with version 1.1.0?  I
> have
> > > 1.0.1 installed on a debian system.
> >
> >
> > Can you "print(dates)" before calling plot in the environment in which
> > it fails and post the output here.
> >
> > JDH
>
> Sure, the commands where it crashes and the output are:
>
> print dates
> pyplot.axis([0, len(prices.label[0]), -1.5, 1.5])
>



OK, here is where the problem is.  In the plt.axis call you are setting the
x-axis min to 0 which is not a legal date value.  I suggest letting the
x-axis take care of itself, and set the y-axis limits with

plt.ylim(-1.5, 1.5)

JDH
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Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread Ted To 
On 02/08/2012 11:17 AM, John Hunter wrote:
> 
> 
> On Wed, Feb 8, 2012 at 10:06 AM, Ted To  > wrote:
> 
> If it hasn't been fixed, is there a workaround?
> 
> On 02/08/2012 10:42 AM, Ted To wrote:
> > I believe I have traced it to some axhline and axis commands and
> this is
> > apparently an old problem.  Does it work with version 1.1.0?  I have
> > 1.0.1 installed on a debian system.
> 
> 
> Can you "print(dates)" before calling plot in the environment in which
> it fails and post the output here.
> 
> JDH

Sure, the commands where it crashes and the output are:

print dates
pyplot.axis([0, len(prices.label[0]), -1.5, 1.5])
pyplot.axhline(-.5,color='r')
pyplot.axhline(.5,color='r')
pyplot.axhline(0,color='.75')
diff = (fisherChained-tornqvistChained)*100
pyplot.plot_date(pylab.date2num(dates),diff,'b-',label='Chained')
pyplot.setp(pyplot.gca().get_xmajorticklabels(),rotation=30)
pyplot.savefig(city+agg+'Diffs.pdf')


[datetime.date(1992, 12, 12), datetime.date(1992, 12, 19),
datetime.date(1992, 12, 26), datetime.date(1993, 1, 2),
datetime.date(1993, 1, 9), datetime.date(1993, 1, 16),
datetime.date(1993, 1, 23), datetime.date(1993, 1, 30),
datetime.date(1993, 2, 6), datetime.date(1993, 2, 13),
datetime.date(1993, 2, 20), datetime.date(1993, 2, 27),
datetime.date(1993, 3, 6), datetime.date(1993, 3, 13),
datetime.date(1993, 3, 20), datetime.date(1993, 3, 27),
datetime.date(1993, 4, 3), datetime.date(1993, 4, 10),
datetime.date(1993, 4, 17), datetime.date(1993, 4, 24),
datetime.date(1993, 5, 1), datetime.date(1993, 5, 8),
datetime.date(1993, 5, 15), datetime.date(1993, 5, 22),
datetime.date(1993, 5, 29), datetime.date(1993, 6, 5),
datetime.date(1993, 6, 12), datetime.date(1993, 6, 19),
datetime.date(1993, 6, 26), datetime.date(1993, 7, 3),
datetime.date(1993, 7, 10), datetime.date(1993, 7, 17),
datetime.date(1993, 7, 24), datetime.date(1993, 7, 31),
datetime.date(1993, 8, 7), datetime.date(1993, 8, 14),
datetime.date(1993, 8, 21), datetime.date(1993, 8, 28),
datetime.date(1993, 9, 4), datetime.date(1993, 9, 11),
datetime.date(1993, 9, 18), datetime.date(1993, 9, 25),
datetime.date(1993, 10, 2), datetime.date(1993, 10, 9),
datetime.date(1993, 10, 16), datetime.date(1993, 10, 23),
datetime.date(1993, 10, 30), datetime.date(1993, 11, 6),
datetime.date(1993, 11, 13), datetime.date(1993, 11, 20),
datetime.date(1993, 11, 27), datetime.date(1993, 12, 4),
datetime.date(1993, 12, 11), datetime.date(1993, 12, 18),
datetime.date(1993, 12, 25), datetime.date(1994, 1, 1),
datetime.date(1994, 1, 8), datetime.date(1994, 1, 15),
datetime.date(1994, 1, 22), datetime.date(1994, 1, 29),
datetime.date(1994, 2, 5), datetime.date(1994, 2, 12),
datetime.date(1994, 2, 19), datetime.date(1994, 2, 26),
datetime.date(1994, 3, 5), datetime.date(1994, 3, 12),
datetime.date(1994, 3, 19), datetime.date(1994, 3, 26),
datetime.date(1994, 4, 2), datetime.date(1994, 4, 9),
datetime.date(1994, 4, 16), datetime.date(1994, 4, 23),
datetime.date(1994, 4, 30), datetime.date(1994, 5, 7),
datetime.date(1994, 5, 14), datetime.date(1994, 5, 21),
datetime.date(1994, 5, 28), datetime.date(1994, 6, 4),
datetime.date(1994, 6, 11), datetime.date(1994, 6, 18),
datetime.date(1994, 6, 25), datetime.date(1994, 7, 2),
datetime.date(1994, 7, 9), datetime.date(1994, 7, 16),
datetime.date(1994, 7, 23), datetime.date(1994, 7, 30),
datetime.date(1994, 8, 6), datetime.date(1994, 8, 13),
datetime.date(1994, 8, 20), datetime.date(1994, 8, 27),
datetime.date(1994, 9, 3), datetime.date(1994, 9, 10),
datetime.date(1994, 9, 17), datetime.date(1994, 9, 24),
datetime.date(1994, 10, 1), datetime.date(1994, 10, 8),
datetime.date(1994, 10, 15), datetime.date(1994, 10, 22),
datetime.date(1994, 10, 29), datetime.date(1994, 11, 5),
datetime.date(1994, 11, 12), datetime.date(1994, 11, 19),
datetime.date(1994, 11, 26), datetime.date(1994, 12, 3),
datetime.date(1994, 12, 10), datetime.date(1994, 12, 17),
datetime.date(1994, 12, 24), datetime.date(1994, 12, 31)]
Traceback (most recent call last):
  File "makeIndices.py", line 128, in 
pyplot.setp(pyplot.gca().get_xmajorticklabels(),rotation=30)
  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 2440, in
get_xmajorticklabels
self.xaxis.get_majorticklabels())
  File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 1071, in
get_majorticklabels
ticks = self.get_major_ticks()
  File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 1169, in
get_major_ticks
numticks = len(self.get_major_locator()())
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 743, in
__call__
self.refresh()
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 752, in
refresh
dmin, dmax = self.viewlim_to_dt()
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 524, in
viewlim_to_dt
return num2date(vmin, self.tz), num2date(vmax, self.tz)
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 289, in
num2date
if not c

Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread John Hunter 
On Wed, Feb 8, 2012 at 10:06 AM, Ted To  wrote:

> If it hasn't been fixed, is there a workaround?
>
> On 02/08/2012 10:42 AM, Ted To wrote:
> > I believe I have traced it to some axhline and axis commands and this is
> > apparently an old problem.  Does it work with version 1.1.0?  I have
> > 1.0.1 installed on a debian system.
>

Can you "print(dates)" before calling plot in the environment in which it
fails and post the output here.

JDH
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Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread Ted To 
If it hasn't been fixed, is there a workaround?

On 02/08/2012 10:42 AM, Ted To wrote:
> I believe I have traced it to some axhline and axis commands and this is
> apparently an old problem.  Does it work with version 1.1.0?  I have
> 1.0.1 installed on a debian system.
> 
> On 02/08/2012 09:47 AM, Ted To wrote:
>> Hi,
>>
>> I'm experiencing a very strange problem with plot_date that I can't
>> figure out.
>>
>> pyplot.plot_date(pylab.date2num(dates),diff,'b-',label='Chained')
>> pyplot.show()
>>
>> dates, naturally, is a list of dates and diff is an array of floats.
>> With my script, this fails.  But if I interactively enter dates and diff
>> and then type the above commands, it works with no problems.  Any ideas
>> or suggestions?
>>
>> The traceback follows.
>>
>> Thanks,
>> Ted
>>
>> Exception in Tkinter callback
>> Traceback (most recent call last):
>>   File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
>> return self.func(*args)
>>   File
>> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
>> line 245, in resize
>> self.show()
>>   File
>> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
>> line 248, in draw
>> FigureCanvasAgg.draw(self)
>>   File
>> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py", line
>> 394, in draw
>> self.figure.draw(self.renderer)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
>> draw_wrapper
>> draw(artist, renderer, *args, **kwargs)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 798, in
>> draw
>> func(*args)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
>> draw_wrapper
>> draw(artist, renderer, *args, **kwargs)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1946, in draw
>> a.draw(renderer)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
>> draw_wrapper
>> draw(artist, renderer, *args, **kwargs)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 971, in draw
>> tick_tups = [ t for t in self.iter_ticks()]
>>   File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 904, in
>> iter_ticks
>> majorLocs = self.major.locator()
>>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 743, in
>> __call__
>> self.refresh()
>>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 752, in
>> refresh
>> dmin, dmax = self.viewlim_to_dt()
>>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 524, in
>> viewlim_to_dt
>> return num2date(vmin, self.tz), num2date(vmax, self.tz)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 289, in
>> num2date
>> if not cbook.iterable(x): return _from_ordinalf(x, tz)
>>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 203, in
>> _from_ordinalf
>> dt = datetime.datetime.fromordinal(ix)
>> ValueError: ordinal must be >= 1
>>
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Re: [Matplotlib-users] Strange plot_date problem

2012-02-08 Thread Ted To 
I believe I have traced it to some axhline and axis commands and this is
apparently an old problem.  Does it work with version 1.1.0?  I have
1.0.1 installed on a debian system.

On 02/08/2012 09:47 AM, Ted To wrote:
> Hi,
> 
> I'm experiencing a very strange problem with plot_date that I can't
> figure out.
> 
> pyplot.plot_date(pylab.date2num(dates),diff,'b-',label='Chained')
> pyplot.show()
> 
> dates, naturally, is a list of dates and diff is an array of floats.
> With my script, this fails.  But if I interactively enter dates and diff
> and then type the above commands, it works with no problems.  Any ideas
> or suggestions?
> 
> The traceback follows.
> 
> Thanks,
> Ted
> 
> Exception in Tkinter callback
> Traceback (most recent call last):
>   File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
> return self.func(*args)
>   File
> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
> line 245, in resize
> self.show()
>   File
> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
> line 248, in draw
> FigureCanvasAgg.draw(self)
>   File
> "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py", line
> 394, in draw
> self.figure.draw(self.renderer)
>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
>   File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 798, in
> draw
> func(*args)
>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
>   File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1946, in draw
> a.draw(renderer)
>   File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
> draw_wrapper
> draw(artist, renderer, *args, **kwargs)
>   File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 971, in draw
> tick_tups = [ t for t in self.iter_ticks()]
>   File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 904, in
> iter_ticks
> majorLocs = self.major.locator()
>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 743, in
> __call__
> self.refresh()
>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 752, in
> refresh
> dmin, dmax = self.viewlim_to_dt()
>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 524, in
> viewlim_to_dt
> return num2date(vmin, self.tz), num2date(vmax, self.tz)
>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 289, in
> num2date
> if not cbook.iterable(x): return _from_ordinalf(x, tz)
>   File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 203, in
> _from_ordinalf
> dt = datetime.datetime.fromordinal(ix)
> ValueError: ordinal must be >= 1
> 
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[Matplotlib-users] Strange plot_date problem

2012-02-08 Thread Ted To 
Hi,

I'm experiencing a very strange problem with plot_date that I can't
figure out.

pyplot.plot_date(pylab.date2num(dates),diff,'b-',label='Chained')
pyplot.show()

dates, naturally, is a list of dates and diff is an array of floats.
With my script, this fails.  But if I interactively enter dates and diff
and then type the above commands, it works with no problems.  Any ideas
or suggestions?

The traceback follows.

Thanks,
Ted

Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
return self.func(*args)
  File
"/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
line 245, in resize
self.show()
  File
"/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py",
line 248, in draw
FigureCanvasAgg.draw(self)
  File
"/usr/lib/pymodules/python2.6/matplotlib/backends/backend_agg.py", line
394, in draw
self.figure.draw(self.renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/matplotlib/figure.py", line 798, in
draw
func(*args)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/matplotlib/axes.py", line 1946, in draw
a.draw(renderer)
  File "/usr/lib/pymodules/python2.6/matplotlib/artist.py", line 55, in
draw_wrapper
draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 971, in draw
tick_tups = [ t for t in self.iter_ticks()]
  File "/usr/lib/pymodules/python2.6/matplotlib/axis.py", line 904, in
iter_ticks
majorLocs = self.major.locator()
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 743, in
__call__
self.refresh()
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 752, in
refresh
dmin, dmax = self.viewlim_to_dt()
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 524, in
viewlim_to_dt
return num2date(vmin, self.tz), num2date(vmax, self.tz)
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 289, in
num2date
if not cbook.iterable(x): return _from_ordinalf(x, tz)
  File "/usr/lib/pymodules/python2.6/matplotlib/dates.py", line 203, in
_from_ordinalf
dt = datetime.datetime.fromordinal(ix)
ValueError: ordinal must be >= 1

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