[R] Loading workspaces from the command line

[Wincent]

It is a promising solution. Yet, there is room for improvement. I
revise the if condition so it won't throw an error during ordinary
startup.

.First <- function() {
  if (length(commandArgs(T))>0 && commandArgs(T)[1] == "ld"){
    load(commandArgs(T)[-1], .GlobalEnv)
  }
}

For the Rload script, it should be:
gnome-terminal --command "R --args ld '$1'"

Note the single quotation of $1. Without it, it does not work if the
file name contains space.

HTH
Best
Ronggui

On 12 January 2009 23:45, Zhou Fang <zhou.zfang at gmail.com> wrote:
> Well, that isn't ideal for my purposes. (A little context - basically
> I have a script that I'm running for a lot of simulations, which is
> kinda buggy, and what I'm doing is I'm having the script periodically
> save whatever it has done so far to an automatically named file. Then
> if something odd happens in between two saves, I can run forward from
> a previously saved point to find the problem and figure out why it
> happened, and also I won't risk losing everything if something
> catastrophic happens.)
>
> Anyways, if anyone's interested, in .Rprofile
>
> .First <- function(){
>  if (rev(commandArgs())[2] == "ld"){
>    load(rev(commandArgs())[1], .GlobalEnv)
>  }
> }
>
> Then e.g.
>
> alias Rload='R --arg ld'
>
> or make a bash script with
>
> gnome-terminal --command "R --args ld $1"
>
> and set some Open With options, and you'll be about to open R
> workspaces from Nautilus etc by point and click.
>
> Zhou
>
>
> On Mon, Jan 12, 2009 at 3:14 PM, Gabor Grothendieck
> <ggrothendieck at gmail.com> wrote:
>> Another possibility is to have a separate directory
>> for each project and place an .RData file in each.
>> Now just cd to whatever directory corresponds to the
>> project you wish to work on and start R normally.
>> No code is needed.
>>
>> On Mon, Jan 12, 2009 at 10:04 AM, Zhou Fang <zhou.zfang at gmail.com> wrote:
>>> Ok, looks like I can do what I want with --args, commandArgs() and an
>>> appropiate .First.
>>>
>>> Thanks,
>>>
>>> Zhou
>>>
>>> On Mon, Jan 12, 2009 at 2:27 PM, David Winsemius <dwinsemius at comcast.net> wrote:
>>>> See if this material is helpful:
>>>>
>>>> http://cran.r-project.org/doc/manuals/R-intro.html#Invoking-R-from-the-command-line
>>>>
>>>> -- David Winsemius
>>>>
>>>> On Jan 12, 2009, at 7:24 AM, Zhou Fang wrote:
>>>>
>>>>> That's not really what I meant by 'command line'. I meant, well,
>>>>> loading from e.g. a bash shell, not from within an interactive R
>>>>> session itself.
>>>>>
>>>>> Thanks anyways,
>>>>>
>>>>> Zhou
>>>>>
>>>>> (Possibly this email was sent twice. Apologies)
>>>>>
>>>>> On Mon, Jan 12, 2009 at 12:15 PM, Henrique Dallazuanna <wwwhsd at gmail.com>
>>>>> wrote:
>>>>>>
>>>>>> See ?load
>>>>>>
>>>>>> On Mon, Jan 12, 2009 at 10:12 AM, Zhou Fang <zhou.zfang at gmail.com> wrote:
>>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> Is there any way to load workspaces (e.g. stuff from save.image) from
>>>>>>> the command line? I'm on Linux, and would find this very helpful.
>>>>>>>
>>>>>>> I'm guessing this functionality can be duplicated with a skillful bash
>>>>>>> script to rename the particular file to .RData (and then back once R
>>>>>>> terminates), but I'm wondering if there's a better way.
>>>>>>>
>>>>>>> Zhou Fang
>>>>>>>
>>>>>>> ______________________________________________
>>>>>>> R-help at r-project.org mailing list
>>>>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>>>>> PLEASE do read the posting guide
>>>>>>> http://www.R-project.org/posting-guide.html
>>>>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Henrique Dallazuanna
>>>>>> Curitiba-Paraná-Brasil
>>>>>> 25° 25' 40" S 49° 16' 22" O
>>>>>>
>>>>>
>>>>> ______________________________________________
>>>>> R-help at r-project.org mailing list
>>>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>>>> PLEASE do read the posting guide
>>>>> http://www.R-project.org/posting-guide.html
>>>>> and provide commented, minimal, self-contained, reproducible code.
>>>>
>>>>
>>>
>>> ______________________________________________
>>> R-help at r-project.org mailing list
>>> https://stat.ethz.ch/mailman/listinfo/r-help
>>> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
>>> and provide commented, minimal, self-contained, reproducible code.
>>>
>>
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Wincent Ronggui HUANG
Doctoral Candidate
Dept of Public and Social Administration
City University of Hong Kong
http://asrr.r-forge.r-project.org/rghuang.html