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data1
2010 Sep 26
1
formatting data for predict()
...t;newdata" option of predict() in order to
generate the same predicted probabilities as above. The same code as
above does not work:
p2a=predict(mod2, type="response", newdata=as.data.frame(cbind(x1,
x2=0)))
unique(p2a)
Nor does creating a data frame that has the names "datx1" and "datx2,"
which is how the variables appear if you run a summary() on mod2.
Looking at the model matrix of mod2 shows that the fitted model only
shows two variables, the dependent variable y and one independent
variable called "dat." It is as if my two variabl...