rbind.rmd

```
ir <- structure( iris, class = c("foo", "data.frame") )
rbind.foo <- function(...) rbind.data.frame(...)
rbind(ir,iris)
#     Sepal.Length Sepal.Width Petal.Length Petal.Width Species
#ir   Numeric,150  Numeric,150 Numeric,150  Numeric,150 factor,150
#iris Numeric,150  Numeric,150 Numeric,150  Numeric,150 factor,150
```

So apparently we get the same as : 

```
rbind( as.list(ir), as.list(iris) )
```