On 5/10/2006 10:11 AM, Liaw, Andy wrote:
> From: Paul Johnson
>>
>> It is a FAQ in our Linux lab. People start emacs and fire up
>> R via ess, and then they have no idea 'where they are". For
>> computer experts, it is not a problem, but for people who
>> don't know much about computers, it is a pretty big problem.
>> They have data in some subdirectory, but almost invariably
>> they don't get emacs & R started from that same place.
>
> ESS by default will prompt for start-up directory when starting
> R. Perhaps that was turned off in the lab?
>
>
>> Unfortunately, for our users, it does not help to simply
>> re-label setwd as cd. Both commands imply a deeper
>> understanding of the OS than they have. Also, unfortunately,
>> these are the same people who don't understand that FAQs
>> exist and should be consulted. These people are so new/timid
>> that asking in r-help would be the last thing to cross their mind.
>>
>> I've wondered if it would not help to have the R prompt
>> include the directory name, as in an x terminal.
>
> Here's one possibility (on WinXP Pro):
>
>> h <- taskCallbackManager()
>> h$add(function(expr, value, ok, visible) {
> + options(prompt=paste(getwd(),"> ", sep=""))
> + return(TRUE)}, name="pwdprompt")
> [1] "pwdprompt"
> C:/home > setwd("projects")
> C:/home/projects >
That doesn't quite work in the current Rgui, because the menu function
to change directories (File | Change dir...) doesn't trigger the
callback. Not sure if that's a bug or not...
Duncan Murdoch
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