Create checkpoint - was: How to de-source and re-source a file?

So create a checkpoint...


-----------------------------myfile.R---------------------------------

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() 
...

-----------------------------------------------------------------------

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

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