Hello,
Could there be clarification added to glm's documentation? In contrast,
glmnet leaves no ambiguity about what it expects for response.
glm: y: is a vector of observations of length n
glmnet: y: For family="binomial" should be either a factor with two
levels, or a two-column matrix of counts or proportions (the second column is
treated as the target class). For family="multinomial", can be a
nc>=2 level factor, or a matrix with nc columns of counts or proportions. For
either "binomial" or "multinomial", if y is presented as a
vector, it will be coerced into a factor.
"a vector of observations" doesn't really narrow it down much. The
warning emitted when y a is vector of proportions isn't particularly
informative, either.
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Dario Strbenac
University of Sydney
Camperdown NSW 2050
Australia
