Mike, pcolor has had masked array support for a long time. Please send a minimal but complete example of a script that fails; based on what you sent below, I can't tell what the problem is.
Eric Mike Bauer wrote: > Howdy, > > I'm a recent refugee from GMT (Generic Mapping Tools) and am very happy > to have found matplotlib. > > I've been having one nagging issue however that I must resolve as I > require this ability. Basically, I need to mask 2d arrays and plot the > result with pcolor via basemap. > > From the documentation it seems this should be fairly straight forward > and I'm hoping that this is the case. > > Here is an example of problem. > ------------------------------------------- > from pylab import * > import matplotlib.numerix.ma <http://matplotlib.numerix.ma> as ma # > matplotlibrc has numerix : numpy > from matplotlib.toolkits.basemap import Basemap, shiftgrid, addcyclic > import numpy as N > . > . > . > > im = 144 > jm = 93 > lons = N.array([0., ... 357.5],dtype=float) > lats = N.array([-90., ... 90.],dtype=float) > topo_screen = N.zeros((jm,im),dtype='float') > topo_screen[10] = 1 > new_test = 100.* N.ones((jm,im),dtype='float') > masked_test = ma.masked_where(topo_screen,new) > > This works and a screen dump of masked_test seem correct. > > A call to pcolor however results in the following: > matplotlib version 0.90.1 > verbose.level helpful > interactive is False > units is True > platform is linux2 > numerix numpy 1.0.1 > . > . > . > /usr/local/lib/python2.5/site-packages/numpy/core/ma.py:604: > UserWarning: Cannot automatically convert masked array to numeric > because data is masked in one or more locations. > ------------------------------------------- > > Is this an embarrassingly simple error on my part? I hope so. Any help > would be much appreciated. > > Mike > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > > > ------------------------------------------------------------------------ > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
