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tp2528818p2529174
2010 Sep 06
3
likelyhood maximization problem with polr
Dear community,
I am currently trying to fit an ordinal logistic regression model with the
polr function. I often get the same error message :
"attempt to find suitable starting values failed", for example with :
require(MASS)
data(iris)
polr(Species~Sepal.Length+Sepal.Width+Petal.Length+Petal.Width,iris)
(I know the response variable Species should be nominal but I do as levels