[Rd] class(x) <- error

[Paul Gilbert]

I think this is an error in r-devel:

R : Copyright 2003, The R Development Core Team
Version 1.7.0 Under development (unstable) (2003-02-25)
...
 > x <- matrix(1:9,3,3)
 > class(x)<-c("a", "matrix")
 > class(x)
[1] "a"      "matrix"
 > class(x)<-class(x)[-1]
 > class(x)
[1] "a"      "matrix"  # should be "matrix"
 > class(x)<-"matrix"
 > class(x)
[1] "a"      "matrix"  # should be "matrix"

Paul Gilbert