1. an ipython session is invoked with qtconsole --pylab
2. I load a large NetCDF grid (Grid file format: nf (# 18) GMT netCDF format
(float) (COARDS-compliant) [DEFAULT]), approx. 1.15 GB
3. I then try to plot with imshow the data
added below are the lines leading up to the error and the error itself.
This is running on OS X 10.7.4 with a recently installed EPD 7.3.
{code}
from scipy.io import netcdf_file as netcdf
data = netcdf('srtm_43_44_05_06_07_08.grd','r').variables['z'][::-1]
fig, ax = subplots()
data.shape
Out[5]: (24004, 12002)
im = ax.imshow(data, aspect=((data.shape[1])/float(data.shape[0])),
interpolation='none')
---------------------------------------------------------------------------
MemoryError Traceback (most recent call last)
<ipython-input-6-f92e4c4c63b5> in <module>()
----> 1 im = ax.imshow(data, aspect=((data.shape[1])/float(data.shape[0])),
interpolation='none')
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/axes.py
in imshow(self, X, cmap, norm, aspect, interpolation, alpha, vmin, vmax,
origin, extent, shape, filternorm, filterrad, imlim, resample, url, **kwargs)
6743 im.set_clim(vmin, vmax)
6744 else:
-> 6745 im.autoscale_None()
6746 im.set_url(url)
6747
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/cm.py
in autoscale_None(self)
281 if self._A is None:
282 raise TypeError('You must first set_array for mappable')
--> 283 self.norm.autoscale_None(self._A)
284 self.changed()
285
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/matplotlib/colors.py
in autoscale_None(self, A)
889 ' autoscale only None-valued vmin or vmax'
890 if self.vmin is None:
--> 891 self.vmin = ma.min(A)
892 if self.vmax is None:
893 self.vmax = ma.max(A)
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/numpy/ma/core.pyc
in min(obj, axis, out, fill_value)
5873 def min(obj, axis=None, out=None, fill_value=None):
5874 try:
-> 5875 return obj.min(axis=axis, fill_value=fill_value, out=out)
5876 except (AttributeError, TypeError):
5877 # If obj doesn't have a max method,
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/numpy/ma/core.pyc
in min(self, axis, out, fill_value)
5054 # No explicit output
5055 if out is None:
-> 5056 result = self.filled(fill_value).min(axis=axis,
out=out).view(type(self))
5057 if result.ndim:
5058 # Set the mask
/Library/Frameworks/Python.framework/Versions/7.3/lib/python2.7/site-packages/numpy/ma/core.pyc
in filled(self, fill_value)
3388 return self._data
3389 else:
-> 3390 result = self._data.copy()
3391 try:
3392 np.putmask(result, m, fill_value)
MemoryError:
{/code}
------------------------------------------------------------------------------
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