Statistics, Data Science, Analytics, Business Intelligence, Machine Learning.
Lasso has learned to absorb versicolor, instead of the other species, into the intercept. Intuitively, if {virginica, versicolor, setosa} is {1, 2, 3} and we drop versicolor, then the MLE coefficients will be {-1, /, 1} and they get shrunk equally. But if we drop setosa because we go by