[R] Loading user defined functions autometically each time I start R

[Patrick Connolly]

On Wed, 27-Feb-2008 at 10:06AM +0000, Richard.Cotton at hsl.gov.uk wrote:

|> > I wrote some user defined function for my own. Now I want to get a 
|> mechanism
|> > so that every time I start R, those function will automatically be 
|> loaded in
|> > R without manually copying pasting. Can gurus here pls tell me how to do
|> > that? Or I have to build my own packages bundled with those functions.
|> 
|> These instructions are for Windows, there may be a slight difference on 
|> other platforms.
|> 
|> In R_HOME\etc you should have a file named RProfile.site.
|> 
|> Inside this file, you can define a .First function, which sources your 
|> functions, e.g.
|> 
|> .First <- function()
|> {
|>     source("c://myfunction.r")
|> }

Those functions will end up in each working directory you use.  Unless
you have only a small number of those functions, that will produce a
lot of unnecessary duplication.  You can avoid that by saving those
functions in a .RData type file, and then something like:

attach("/path/to/file/.RData")

There's no need for a .First file.  Having that line in your .Rprofile
will be sufficient.

It would be tidier to make them into a package, but the above will
work easily enough.

HTH

-- 
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