[R] the value of the last expression

[Duncan Murdoch]

On 10/12/2012 2:37 PM, Sam Steingold wrote:
> > * arun <fznegcvax111 at lnubb.pbz> [2012-12-10 11:22:03 -0800]:
> >
> > It is working for me.
>
> I do not claim to have found a bug.
> I am merely pleading for help figuring out what could have gone wrong.
> .Last.value word when I first start R under Emacs/ESS.
> Then it stops working.
> I can't figure out when or why...

Use the usual debugging strategy:  simplify things.  Do you see the 
problem when you're running plain R, with no ESS?  Do you see the 
problem when you run R with the --vanilla option?  Do you have a script 
that reliably causes the failure?  Simplify it to a minimal script that 
causes the failure.

If you don't have a reproducible script yet to cause the error, then 
work on creating one.  (The next time you see it, save the entire 
history of the session, and see if re-running that history in a new 
session will reproduce the error.)

Duncan Murdoch

>
> --8<---------------cut here---------------start------------->8---
> > sessionInfo()
> R version 2.15.2 (2012-10-26)
> Platform: x86_64-pc-linux-gnu (64-bit)
>
> locale:
> [1] C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  compiler  methods
> [8] base
>
> loaded via a namespace (and not attached):
> [1] tools_2.15.2
> --8<---------------cut here---------------end--------------->8---
>
>
> > sessionInfo()
> > R version 2.15.0 (2012-03-30)
> > Platform: x86_64-pc-linux-gnu (64-bit)
> >
> > locale:
> >  [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
> >  [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
> >  [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8
> >  [7] LC_PAPER=C                 LC_NAME=C
> >  [9] LC_ADDRESS=C               LC_TELEPHONE=C
> > [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C
> >
> > attached base packages:
> > [1] stats     graphics  grDevices utils     datasets  methods   base
> >
> > other attached packages:
> > [1] matrixStats_0.6.2 stringr_0.6       reshape_0.8.4     plyr_1.7.1
> >
> > loaded via a namespace (and not attached):
> > [1] R.methodsS3_1.4.2 tools_2.15.0
> > A.K.
> >
> >
> >
> >
> > ----- Original Message -----
> > From: Sam Steingold <sds at gnu.org>
> > To: r-help at r-project.org; Richard M. Heiberger <rmh at temple.edu>
> > Cc:
> > Sent: Monday, December 10, 2012 2:13 PM
> > Subject: Re: [R] the value of the last expression
> >
> >> * Richard M. Heiberger <ezu at grzcyr.rqh> [2012-02-09 21:48:50 -0500]:
> >>
> >> .Last.value
> >
> > Thanks; it worked for a while, but not anymore:
> >
> > http://stat.ethz.ch/R-manual/R-patched/library/base/html/Last.value.html
> >> gamma(1:15)
> > [1]           1           1           2           6          24         120
> > [7]         720        5040       40320      362880     3628800    39916800
> > [13]   479001600  6227020800 87178291200
> >> z <- .Last.value
> >> z
> > NULL
> >
> > could my .Rprofile be at fault?
> > ## breaks ess
> > ## options(error = utils::recover)
> > options(max.print = 100, repos = c(CRAN = "http://lib.stat.cmu.edu/R/CRAN/"))
> > library(compiler)
> > compiler::enableJIT(3)
> > compiler::compilePKGS(1)
> >
> >
> >> On Thu, Feb 9, 2012 at 9:44 PM, Sam Steingold <sds at gnu.org> wrote:
> >>
> >>> Is there an analogue of common lisp "*" variable which contains the
> >>> value of the last expression?
> >>> E.g., in lisp:
> >>> > (+ 1 2)
> >>> 3
> >>> > *
> >>> 3
> >>>
> >>> I wish I could recover the value of the last expression without
> >>> re-evaluating it.
>