[Scipy-tickets] [SciPy] #763: interpolate.Rbf: support linear basis functions

SciPy scipy-tickets@scipy....
Tue Oct 28 04:59:19 CDT 2008


#763: interpolate.Rbf: support linear basis functions
-------------------------+--------------------------------------------------
 Reporter:  pv           |       Owner:  somebody       
     Type:  enhancement  |      Status:  new            
 Priority:  normal       |   Milestone:  0.7.0          
Component:  Other        |     Version:                 
 Severity:  normal       |    Keywords:  interpolate rbf
-------------------------+--------------------------------------------------
 Rbf interpolation should support linear basis functions.

 Presently, this can be emulated by the multiquadrics:
 {{{
 import scipy as sp
 import scipy.intepolate
 sp.interpolate.Rbf(sp.asarray([1,2,1,2]), sp.asarray([1,1,2,2]),
                    sp.asarray([1,2,3,4]),
                    epsilon=1e-99, function='multiquadric')
 }}}

 It appears to me that if the nodes are unevenly distributed, any other
 interpolation options offered by interpolate.Rbf are unstable and will not
 work for most of the time. (TODO: file a ticket demonstrating this in an
 example -- maybe it's a bug somewhere?)

-- 
Ticket URL: <http://scipy.org/scipy/scipy/ticket/763>
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