[R] How to de-source and re-source a file?

[Roebuck,Paul L]

So create a checkpoint...


-----------------------------myfile.R---------------------------------
checkpoint.file <- "checkpoint_appname.RData"
if (!file.exists(checkpoint.file) {
  ## Do compute intensive processing...
  {
    my.seed <- 1234
    ans <- long.comp( my.seed)
  }  
  objects2save <- c("ans", "my.seed")
  save(list=objects2save,
       file=checkpoint.file)
} else {
  load(checkpoint.file)
}
browser()
...

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On 12/6/11 12:44 PM, "Michael" <comtech.usa at gmail.com> wrote:

> the problem with restarting R is that I then have to re-execute the program
> until the point where I wanted to debug, which is a very long-waiting
> time...
> 
> On Tue, Dec 6, 2011 at 12:17 PM, Duncan Murdoch
> <murdoch.duncan at gmail.com>wrote:
> 
>>  On 06/12/2011 1:10 PM, Michael wrote:
>> 
>>> i.e. how to make sure the function that was loaded into workspace/memory
>>> is
>>> the version that I edited latest... not some stale version...
>>> 
>>> This might solve some of my breakpoint and browser/debug problem, even the
>>> RStudio problem that I've met....
>>> 
>> 
>> You can use rm() to remove a function.
>> 
>> You can also quit and restart R, making sure that it *does not* load an
>> existing workspace (by deleting the .Rdata file if it exists, and never
>> answering "yes" to the question to save it.)  This gives you a nice clean
>> slate.
>> 
>> Duncan Murdoch
>> 
> 
> [[alternative HTML version deleted]]
> 
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