Jeff, Thanks for the speedy reply. Should a warning be raised then that my data (though in 2D form) is not 2D and therefore is invalid input?
Cheers, Josh Lawrence Ph.D. Student Clemson University On Apr 16, 2009, at 2:53 PM, Jeff Whitaker wrote: > Josh Lawrence wrote: >> Greetings all, >> >> In using the function griddata in mlab.py, I think I have found a >> bug. The following line in mlab.py errors for me. >> I supply it an xi and yi that have shape (N,1). I have surface >> data, but I only care about the variation in one direction. In >> mlab, when it gets to this line (2956 in svn revision 7040): >> >> if min(xo[1:]-xo[0:-1]) < 0 or min(yo[1:]-yo[0:-1]) < 0: >> raise ValueError, 'output grid defined by xi,yi must >> be monotone increasing' >> >> the result is an error. That is, I get the following: >> >> ValueError: min() arg is an empty sequence >> >> A couple of things. First, if I make my variation in x to be 2 >> points (x = 0 for the case I'm interested in--so I just have both >> values of x be zero), I do not get this error and I believe the >> result works. So, it seems that there should be some handling of >> the case that there are only 1 point in either x or y direction. >> >> Second, is it better to use the builtin python function min, or >> should numpy.min be used instead? >> >> Cheers, >> >> Josh Lawrence >> Ph.D. Student >> Clemson University > > Josh: griddata currently only works for 2-D output grids. It may > be possible to modify it to work with 1-D data, but that was not the > original intent of the function. > > -Jeff > > -- > Jeffrey S. Whitaker Phone : (303)497-6313 > Meteorologist FAX : (303)497-6449 > NOAA/OAR/PSD R/PSD1 Email : jeffrey.s.whita...@noaa.gov > 325 Broadway Office : Skaggs Research Cntr 1D-113 > Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg > ------------------------------------------------------------------------------ Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
