R-beta: R 0.61.1 model.matrix(), etc.

Rashid Nassar rnassar at acpub.duke.edu
Sun Jul 5 15:29:48 CEST 1998

1. THANK YOU! to all who make R possible.  It is a real joy to use.

2. The following may or may not be (minor) bugs, but I thought I'd mention 
them anyway:

(a) model.matrix() seems unduly finicky: it seems to accept only "simple" 
variable names (x1, but not, say, dframe$x1 or I(x1^2), for example) in 
its argument. model.frame(), however, has no problem with these.

(b) If A is a factor, "mode(A)" returns "numeric", and both "is.numeric(A)" 
and "is.factor(A)" return "TRUE". 

Thank you again,

Rashid Nassar

r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch

More information about the R-help mailing list