Hello Splus users, I am using the function polr in library(MASS).Below are
the the command I use
polr(as.ordered(q23p)~
timep+dayp+sitep+rq2p+typep+rq4ap+rq4bp+vehicp+passp+survp+sex1p+sex2p+age1p+age2p+perp+q3p+q4p+q5p+q6p+q7p+q8a2p+q8b2p+
q8c2p+q9p+ q10p+q11p+q12p+q13p+
q14p+q15p+q16p+q17p+q18p+q19p+q20p+q21ap+q21bp+q22p+q23p+q24p+q25p+q26p+q27p+q28p+
q29p+q30ap+q30bp+q30cp+q31ap+q31bp+q31cp+ q31dp+q32p+q33p+segmentp+
htypep+newtypep+tptimedp, data=newdatap)
But I am getting the following warning message singularity encountered in:
nlminb.1(temp, p, liv, lv, objective, gradient, bounds, scale)
Can anyone suggest what it could be wrong?
Any hints will be appreciated
Thank you
Charis
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