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young
2007 Jul 16
2
Error while fitting Partial Proportional Odds model using vglm
..., eta = eta, extra)
3: 19 elements replaced by 1.819e-12 in: checkwz(wz, M = M, trace = trace,
wzeps = control$wzepsilon)
Ironically, it works ok with Proportional Odds (change parallel = T above),
but fails with PPO (parallel = F).
I will appreciate any help to fix this problem.
Thanks
Rizwan Younis
Grad Student
University of Waterloo
Waterloo, ON Canada