# [Rd] lm documentation, "formula" component (PR#1105)

**david.firth@nuf.ox.ac.uk
**
david.firth@nuf.ox.ac.uk

*Mon, 1 Oct 2001 15:13:02 +0200 (MET DST)*

Full_Name: David Firth
Version: 1.3.1
OS: linux and others
Submission from: (NULL) (163.1.103.121)
help(lm)
says that
An object of class `"lm"' is a list containing at least the
following components:
...
formula: the formula supplied.
But is the "formula" component necessarily present?
An example:
>* x<-rnorm(10)
*>* y<-rnorm(10)
*>* temp<-lm(y~x)
*>* names(temp)
* [1] "coefficients" "residuals" "effects" "rank"
[5] "fitted.values" "assign" "qr" "df.residual"
[9] "xlevels" "call" "terms" "model"
>* temp$formula
*NULL
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel 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-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._