[Rd] Problematic sentence in Section 6.1 (Lists) of "An introduction to R" (PR#10583)
Full_Name: Michael Höhle Version: 2.7.0 OS: Mac Os X 10.4.11 Submission from: (NULL) (84.153.81.41) Dear R developers, this is not really a bug, but I was confused by the following sentence in Section 6.1 on lists in "An introduction to R" available from e.g. http://cran.r-project.org/doc/manuals/R-intro.html#Lists-and-data-frames Here it says that: Additionally, one can also use the names of the list components in double square brackets, i.e., Lst[["name"]] is the same as Lst$name. ^^^ In the above context this might be right, but if one operates with named lists the $ notation handles abbrevations, whereas the [[]] notation does not. As a consequence I was surprised by the following code: control <- list(nameSpace=1) if (is.null(control$name)) control$name <- TRUE Here control$name is recognized as control$nameSpace and thus control$name is assigned the value TRUE. Had one used control[["name"]] then things would have worked differently. Thus Lst[["name"]] might not be the same as Lst$name. I admit the entire case might be pedantic, but maybe an extra sentence could help. Just a suggestion. __ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
[Rd] PR#10583
Thank you for your quick reply and for only indirectly scolding me for
abusing the RBugs list. :-) However, I do think there is something
funny in the 2.7.0 docu (or in the code). Things behave as expected and
explained by you for version 2.6.0/2.6.1, but in the development
version 2.7.0 (which I was using) the output is different (see below).
The CHANGES file does mention some changes about the [[ subsetting
operator, partial matching and exact=TRUE, so I still think the
documentation could be
clearer at this point by mentioning abbreviations.
###Version 2.6.0
> sessionInfo()
R version 2.6.0 Patched (2007-11-12 r43434)
i386-apple-darwin8.10.1
locale:
C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
> control <- list(nameSpace=FALSE)
> control$name
[1] FALSE
> control[["name"]]
[1] FALSE
Warning message:
In control[["name"]] : partial match of 'name' to 'nameSpace'
###Version 2.7.0 (development)
> sessionInfo()
R version 2.7.0 Under development (unstable) (2007-12-22 r43762)
i386-apple-darwin8.10.1
locale:
C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
> control <- list(nameSpace=FALSE)
> control$name
[1] FALSE
> control[["name"]]
NULL
^
Anyhow, with your help I found out that what I really wanted was
control <- list(nameSpace=FALSE)
if (is.null(control[["name",exact=TRUE]])) { control[["name"]] <- TRUE }
Thank your for your help and best regards,
Michael
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[Rd] Bug or Feature in Rcmd build workaround workaround for paths in Cygwin tar
To R-devel,
I am currently writing a package with R 2.2.1 under Windows using
cygwin and the recommended Rtools. Physically my package ist hosted on
the Drive z: .
When I call Rcmd.exe build –-binary for my package I have a problem
with the "build" script in $R_HOME/bin/. Starting on line 226 the code
is as follows:
if($WINDOWS) {
## workaround for paths in Cygwin tar
$filepath =~ s+^([A-Za-x]):+/cygdrive/\1+;
}
Is there a particular reason that only lower case letter from a-x are
handled? As my drive is z: I would like the workaround to work for
lower case letters a-z.
Best regards,
Michael Höhle
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[Rd] Syntax Error in Rcmd check on Windows
Dear R-developers,
I am currently developing an R package called RLadyBug. When
developing under Linux "R CMD check ." works fine without a warning.
However, when I do "Rcmd check ." under Windows (version 2.4.0 and
earlier) I get a „syntax error" when checking the examples.
This puzzles me somewhat, because a manual source("RLadyBug-Ex.R") on
Windows works fine. On the other hand, a "Rterm.exe --no-save <
RLadyBug-Ex.R" in a command shell under Windows reproduces the error.
My first guess was that the very long line was causing the problem,
but when I open RLadyBug-Ex.R in Emacs, change the coding system from
"undecided-dos" to "undecided-unix" and save the file "Rterm.exe
--no-save < RLadyBug-Ex.R" works fine
Does anybody has an idea what is causing the error and how to fix this?
Best regards,
Michael Höhle
--
---
* checking for working latex ... OK
* using log directory 'z:/Transmission/RLadyBug/..Rcheck'
* using R version 2.4.0 (2006-10-03)
* checking for file './DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'RLadyBug' version '0.4-1'
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking whether package 'RLadyBug' can be installed ... OK
* checking package directory ... OK
* checking for portable file names ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking R files for syntax errors ... OK
* checking R files for non-ASCII characters ... OK
* checking whether the package can be loaded ... OK
* checking whether the package can be loaded with stated dependencies ... OK
* checking whether the name space can be loaded with stated dependencies ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... OK
* checking Rd files ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* creating RLadyBug-Ex.R ... OK
* checking examples ... ERROR
Running examples in 'RLadyBug-Ex.R' failed.
The error most likely occurred in:
> ### * LBExperiment-class
>
> flush(stderr()); flush(stdout())
>
> ### Name: LBExperiment-class
> ### Title: Class "LBExperiment"
> ### Aliases: LBExperiment-class show,LBExperiment-method
> ### plot,LBExperiment-method plot,LBExperiment,missing-method
> ### summary,LBExperiment-method data2events,LBExperiment-method
> ### data2events
> ### Keywords: classes
>
> ### ** Examples
>
> sim.layout <- new( "LBLayout", S0=matrix( c( 13, rep( 14, 7 ) ), ncol=4 ),
+ E0=matrix( c( 1, rep( 0, 7 ) ), ncol=4 ) )
> sim.opts <- new( "LBOptions", seed=2006,
+ LBmodel=c( "gamma", "gamma", "gamma", FALSE ),
+ ignoreData=c( FALSE, FALSE, FALSE ),
+ initBeta =list( init=0.125,
+ gamma=0.001, delta=0.001 ),
+ initBetaN=list( init=0.018,
+ gamma=0.001, delta=0.001 ),
+ initIncu=list( asis=FALSE, const=FALSE,
+ g=6.697, g.gamma=0.001, g.delta=0.001,
+ d=0.84, d.gamma=0.001,d.delta=0.001 ),
+ initInf=list( 1.772, 0.001, 0.001,
0.123, 0.001, 0.001 ),
+ initDia=list( 149.126, 0.001, 0.001,
+ 8.737, 0.001, 0.001 ) )
Error: syntax error in:
"a=list( 149.126, 0.001, 0.001,
" 8.737, 0.001, 0.001 ) )
Execution halted
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Re: [Rd] Syntax Error in Rcmd check on Windows
Hello again,
Thank you for the feedback. I put the source File on the net as
http://www.statistik.lmu.de/~hoehle/software/RLadyBug/RLadyBug-Ex.zip
In case you need the entire "..Rcheck" directory I put this as
http://www.statistik.lmu.de/~hoehle/software/RLadyBug/Rcheck.zip
The "(" ")" should balance as it runs through source without
problems. I tried to use "hexl-mode" in Emacs to look for funny
characters, but didn't find any. If I delete the "initDia" line I just
get an syntax error a few lines later...
Probably its something very stupid thats wrong, but atm I fail to see it.
Best regards,
Michael Höhle
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