strange warning: data() error?

On Apr 16, 2018, at 2:58 PM, Therneau, Terry M., Ph.D. via R-devel <r-devel at r-project.org> wrote:

A user asked me about this and I can't figure it out.

tmt% R
R Under development (unstable) (2018-04-09 r74565) -- "Unsuffered Consequences"
Copyright (C) 2018 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

library(survival)
data(cgd0)

Warning message:
In data(cgd0) : data set ?cgd0? not found

----

The data set is present and can be manipulated: data() is not required.  Other data sets in the survival package don't generate this message.

On a Mac the Data Manager panel lists that dataset as "cgd0 (cgd)" and I get the same warning with any dataset that has a similar appearance of <name paren-name-paren> , even the `state.abb` vector that is displayed "state.abb (state)" (without the quotes.)

data('state.abb')

Warning message:
In data("state.abb") : data set ?state.abb? not found

str(state.abb)

chr [1:50] "AL" "AK" "AZ" "AR" "CA" "CO" "CT" "DE" "FL" "GA" "HI" "ID" "IL" "IN" "IA" "KS" "KY" "LA" "ME" "MD" "MA" ...

data(stack.loss)

Warning message:
In data(stack.loss) : data set ?stack.loss? not found

So I guess the message is don't feel picked upon. It seems to be an infelicity shared by many other datasets even those in the canonical 'datasets' package.

Terry T.

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