Paul Novak wrote: > I have a problem that arose when I tried to run the gridding irregularly > spaced data demo on the wiki > http://www.scipy.org/Cookbook/Matplotlib/Gridding_irregularly_spaced_data > > When I run the attached script, which sets one value of an array to > nan, masks the array where there are nan, and tries to plot it using > contour(), I get the following errors: > > /usr/lib/python2.4/site-packages/numpy/core/ma.py:604: UserWarning: > Cannot automatically convert masked array to numeric because data > is masked in one or more locations. > warnings.warn("Cannot automatically convert masked array to "\ > Traceback (most recent call last): > File "masked_nan.py", line 18, in ? > contour(x, y, z) > File "/usr/lib/python2.4/site-packages/matplotlib/pylab.py", line > 1754, in contour > ret = gca().contour(*args, **kwargs) > File "/usr/lib/python2.4/site-packages/matplotlib/axes.py", line > 4092, in contour > return ContourSet(self, *args, **kwargs) > File "/usr/lib/python2.4/site-packages/matplotlib/contour.py", line > 429, in __init__ > x, y, z = self._contour_args(*args) # also sets self.levels, > File "/usr/lib/python2.4/site-packages/matplotlib/contour.py", line > 614, in _contour_args > lev = self._autolev(z, 7) > File "/usr/lib/python2.4/site-packages/matplotlib/contour.py", line > 517, in _autolev > zmargin = (zmax - zmin) * 0.001 # so z < (zmax + zmargin) > TypeError: unsupported operand type(s) for -: 'str' and 'str' > > I am using > >>> numpy.__version__ > '1.0' > >>> matplotlib.__version__ > '0.87.7' > > Is there a way to use contour() and plot arrays whose elements may be > nan? > > Thanks, > Paul
Paul: Your test script works for me (numpy 1.0, matplotlib 0.87.7, python2.5 on macos x). -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1 FAX : (303)497-6449 325 Broadway Boulder, CO, USA 80305-3328 ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
