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
