R. Mitra wrote:
> Hello All
> Thanks a lot Eric. I think I have some module missing but I cannot
> figure out what it is. I get the following. Any idea. This started
> hapening after I reinstalled matplotlib.
This is a numpy installation or version problem--notice that at the
bottom of the traceback it is something from numpy that is not being
found. Installation of numpy and mpl on OSX seems to be subject to all
sorts of complications, and I don't use OSX, so I will have to leave
this for someone else on the list.
Eric
>
> File "/Users/Kennel/Pythoncodes/coolingmodel.py", line 6, in <module>
> import matplotlib
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/__init__.py",
>
> line 129, in <module>
> from rcsetup import defaultParams, validate_backend, validate_toolbar
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/rcsetup.py",
>
> line 19, in <module>
> from matplotlib.colors import is_color_like
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/colors.py",
>
> line 54, in <module>
> import matplotlib.cbook as cbook
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib/cbook.py",
>
> line 10, in <module>
> import numpy.ma as ma
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/ma/__init__.py",
>
> line 47, in <module>
> import extras
> File
> "/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/numpy/ma/extras.py",
>
> line 45, in <module>
> from numpy.lib.index_tricks import AxisConcatenator
> ImportError: cannot import name AxisConcatenator
>
>
> The first few lines of my codes are:
>
> from math import *
> import exceptions
> import pmag
> import matplotlib
> matplotlib.use("TkAgg")
> import numpy as np
> import matplotlib.pyplot as plt
>
> Thanks a lot for all your help.
>
> Mitra
>
>
> On Nov 1, 2009, at 11:32 PM, Eric Firing wrote:
>
>> R. Mitra wrote:
>>> Hi Eric
>>> from math import *
>>> import matplotlib
>>> matplotlib.use("TkAgg")
>>> from pylab import *
>>> This is very basic I know. The above are the modules I am using. Is
>>> plt a separate module? Thanks.
>>
>> With your method above, you don't need the "plt." part. "from pylab
>> import *" is discouraged, however, except for quick interactive use.
>> For scripts, it is generally considered better practice to use
>>
>> import matplotlib
>> matplotlib.use("tkagg")
>> import numpy as np
>> import matplotlib.pyplot as plt
>>
>> pyplot is the plot-related part of the pylab namespace; or to put it
>> another way, pylab is pyplot plus numpy.
>>
>> See http://matplotlib.sourceforge.net/faq/usage_faq.html
>>
>> Eric
>>
>>
>>
>>> RM
>>> On Nov 1, 2009, at 7:26 PM, Eric Firing wrote:
>>>> R. Mitra wrote:
>>>>> Hi
>>>>> I am having problems with contourf(). Suppose I have two 10X30
>>>>> arrays X,Y and a corresponding Z value array. How do I make the
>>>>> upper left to be the origin? I cannot use contour
>>>>> (Z,origin='upper') because the axis values gets messed up.
>>>>
>>>> It sounds like maybe you want to reverse the y-axis. Try something
>>>> like plt.gca().invert_yaxis() after your call to contourf.
>>>>
>>>> Eric
>>
>
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