R help - May 2006 - How to strip one term from a data.frame? + How to write long line in script?

I need to run a regression with 14 normal variables
and 20 dummy variables.  All the data is in a huge
data.frame  df.  But there is some extra intermediate
item in the same data.frame too.  It will be nice I
can strip off those terms and run lm().  Also, is
there a simple way to write the formula, for example,
just specify the y term, all other term in data.frame
should be x_i.  Or is there some kind of automatically
way to build it?  like use ls(df) couple with some
other functions?  


If I have to write it in the brute force way, I will
need to write a real long line in script.  I am in
windows.  I found the script does not work with a long
line.  It will not work either if I break it into a
few lines.  How to get rid of that? thanks.

Using the built in data frame iris, which has 5 columns, regress
Sepal.Length against all other variables except the last one:

lm(Sepal.Length ~., iris[1:4])

On 5/1/06, Guojun Zhu <shmilylemon at yahoo.com>
wrote:
> I need to run a regression with 14 normal variables
> and 20 dummy variables.  All the data is in a huge
> data.frame  df.  But there is some extra intermediate
> item in the same data.frame too.  It will be nice I
> can strip off those terms and run lm().  Also, is
> there a simple way to write the formula, for example,
> just specify the y term, all other term in data.frame
> should be x_i.  Or is there some kind of automatically
> way to build it?  like use ls(df) couple with some
> other functions?
>
>
> If I have to write it in the brute force way, I will
> need to write a real long line in script.  I am in
> windows.  I found the script does not work with a long
> line.  It will not work either if I break it into a
> few lines.  How to get rid of that? thanks.
>
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