dates in chron package, split warning message

Dear All,

I am currently using R for windows.

I am wondering why the dates command in chron package does not work in

following situation:

cut(dates(c(23,45,67),origin=c(1,1,2004)),"months")

but will work for:

cut(dates(c(23,45,67),origin=c(1,1,2004)),"days")
cut(dates(c(23,45,67),origin=c(1,1,2004)),"weeks")

My second query is rather trivial but I am wondering why warning

were given when using the split in this manner:

split(matrix(1:12,nrow=4),c(1,1,2,3)) # Which does what I want it to do.

and no warning messages were given in Splus6 for example?

**********

 Steve Su (s.su at qut.edu.au)
 PhD student.

 School of Accountancy
 School of Mathematical Sciences
 Queensland University of Technology

 Postal Address: Steve Su, School of Accountancy, QUT, PO Box 2434,
Brisbane,
 Queensland, Australia, 4000.


 Phone:  +61 7 3864 2017
 Fax:    +61 7 3864 1812
 Mobile: 0421  840  586
     .
   _--_|\
  /      QUT
  \_.--._/
        v

**********

**********

 Steve Su (s.su at qut.edu.au)
 PhD student.

 School of Accountancy
 School of Mathematical Sciences
 Queensland University of Technology

 Postal Address: Steve Su, School of Accountancy, QUT, PO Box 2434,
Brisbane,
 Queensland, Australia, 4000.


 Phone:  +61 7 3864 2017
 Fax:    +61 7 3864 1812
 Mobile: 0421  840  586
     .
   _--_|\
  /      QUT
  \_.--._/
        v

**********