Thanks and good point about unspecified behavior. The way it behaves now
(when it doesn't ignore) is more consistent with data.frame() though so I
prefer that to a "warn and ignore" behaviour:
data.frame(a = 1, b = 2, 3)
#> a b X3
#> 1 1 2 3
data.frame(a = 1, 2, 3)
#> a X2 X3
#> 1 1 2 3
(and in general warnings make for unpleasant debugging so I prefer when we
don't add new ones if avoidable)
playing a bit more with it, it would make sense to me that the following
have the same output:
coefficient <- 3
data.frame(value1 = 5) |> transform(coefficient, value2 = coefficient *
value1)
#> value1 X3 value2
#> 1 5 3 15
data.frame(value1 = 5, coefficient) |> transform(value2 = coefficient *
value1)
#> value1 coefficient value2
#> 1 5 3 15
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