[Scipy-tickets] [SciPy] #398: bessel function problems

SciPy scipy-tickets@scipy....
Tue Apr 17 11:21:50 CDT 2007


#398: bessel function problems
---------------------------+------------------------------------------------
 Reporter:  bryanv         |       Owner:  somebody
     Type:  defect         |      Status:  new     
 Priority:  normal         |   Milestone:          
Component:  scipy.special  |     Version:          
 Severity:  major          |    Keywords:  bessel  
---------------------------+------------------------------------------------
 Ordinary Bessel functions appear to have serious problems starting with
 j_3. I have attached a screenshot of a plot of:

 # Create some data
 x = linspace(0, 450, 10000)
 y = jn(3,x)

 # Create some line plots
 plot(x, y, "b-", bgcolor="white")

 I think there is a newer version of Cephes available, but I'm not sure if
 it fixes this (and other) Bessel problems.

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Ticket URL: <http://projects.scipy.org/scipy/scipy/ticket/398>
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