[SciPy-dev] erf

Charles Harris charles.harris at sdl.usu.edu
Mon Sep 27 14:10:26 CDT 2004

Which erf  is scipy using? There is one in cephes/ndtr.c and another in  
cdflib/erf.f . The two don't give the
same results  for smallish x, and I suspect that erf.f is the more 
accurate because ndtr computes it by
1.0 - erfc(x) .

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