# [Rd] R-intro: Simple manipulations/Vectors and assignment (PR
#2365)

**Bill.Venables@CMIS.CSIRO.AU
**
Bill.Venables@CMIS.CSIRO.AU

*Thu Dec 12 01:03:05 2002*

The message is a warning message, (which is new), but it still works.
I guess the notes could warn you a warning was coming! We might re-think
this, I suggest. It began as an example that forced you to come to grips
with the recycling rule, but it is a bit obsolete now. In S-PLUS 6.x it
actually fails. Perhaps we don't need to be quite so thorough about this
after all and use a more normal example - for example just skip the 0 in the
y assignment and change the text accordingly.
Bill Venables.
-----Original Message-----
From: nvj@fys.ku.dk [mailto:nvj@fys.ku.dk]
Sent: Thursday, December 12, 2002 9:17 AM
To: r-devel@stat.math.ethz.ch
Cc: R-bugs@biostat.ku.dk
Subject: [Rd] R-intro: Simple manipulations/Vectors and assignment
(PR#2365)
Full_Name: Niels Vestergaard Jensen
Version: 1.6.1
OS: Linux (Mandrake 9.0)
Submission from: (NULL) (62.79.36.179)
The R-intro (1.6.1 (2002-11-01)) says in Simple manipulations/Vectors and
assignment:
"So with the above assignments the command
>* v <- 2*x + y + 1
*
generates a new vector v of length 11 constructed by adding together,
element by
element, 2*x repeated 2.2 times, y repeated just once, and 1 repeated 11
times."
That's apparently not true:
>* x <- c(10.4, 5.6, 3.1, 6.4, 21.7)
*>* y <- c(x, 0, x)
*>* x
*[1] 10.4 5.6 3.1 6.4 21.7
>* y
* [1] 10.4 5.6 3.1 6.4 21.7 0.0 10.4 5.6 3.1 6.4 21.7
>* v <- 2*x + y + 1
*Warning message:
longer object length
is not a multiple of shorter object length in: 2 * x + y
Which was run first thing after starting R in a dir without .Rdata. I
suspect R
has been updated, but the R-intro has not kept up.
See also: http://www.zoo.ufl.edu/bolker/emd/R/R-traps.html
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