In the code below, e is an environment which we copy to f and then add attributes to e. Now f winds up with the same attributes.
In other words it seems that the attributes are a property of the environment itself and not of the variable. Thus it appears we cannot have two environment variables that correspond to the original environment but with different attributes. I can understand if we changed a component of e then f would reflect that too but I am not sure that this is also desirable for attributes as they are not "in" the environment. Is that desirable? Is it a bug? No other class works that way AFAIK. Comments? > e <- new.env() > f <- e > attr(e, "X") <- "Y" # X is an attribute of e > f # f gets the same attribute !!! <environment: 0x01a577f0> attr(,"X") [1] "Y" > R.version.string # Windows XP [1] "R version 2.4.0 Under development (unstable) (2006-07-04 r38480)" ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
