On 20/08/2009, at 9:57 AM, Polwart Calum (County Durham and
Darlington NHS Foundation Trust) wrote:
I've been tweaking code for several days on and off in R, cut and
pasting in from a text editor (I just leave them open all the
time). I think I got something that was usable but then a
powersurge tripped the fuses and unfortunately the machine I was
working on doesn't have a UPS.
Does R hold the command data in cache some place? I've
purposefully not opened R since the crash so that if it did I don't
over write it?
I guess what I'm wanting is the equivalent of the linux up arrow
which repeats the last line. i know that exists in R but from what
I recall it didn't work when you close the R session. Is that
stored in a hidden file someplace that I could copy?
Its not a huge piece of code or anything - but it was code I
tweaked over several stages as I'm new to R and so it was part of
my learning process.
Also - is there a better way for the future? I know some people
use IDE's but is that for serious programming or for building a
small function and tweaking it?
If you've been cut-and-pasting from a text editor, then your commands
*might* be in the file .Rhistory. Unfortunately this history gets saved
only when you exit R (and by default only when you also say ``yes'' to
saving the workspace) or if you explicitly savehistory().
After a powersurge, the R workspace and history almost surely will
not be
saved, so it is highly probable that you are SOL. Unless you closed
the R session (and save the workspace) before the power cut. Bummer.
Good luck.
cheers,
Rolf Turner
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