February, 2003
© 2000, 2001
Scott S. Emerson, M.D., Ph.D.
Choice of R
parameter
R > 0:
·Larger
positive values of R make early stopping easier
·When R>0
and P=0, typically need A>0
·Reasonable
range of values: 0.1 < R < 20
·R < 1 is
convex outward
·R > 1 is
convex inward
·When R>0
and P>0, can get change in convexity of boundaries