R devel - Jan 2002 - (PR#1274) data(): Error in FUN(X[[2]], ...) : subscript

data() is making assumptions about the structure of the 00Index files
that are not warranted.  All `Writing R Extensions' says is

  The @file{data} subdirectory should also contain
  a @file{00Index} file that describes the datasets available.  Ideally
  this should have a one-line description of each dataset, with full
  documentation in the @file{man} directory.

whereas data() is assuming it is in a two-column format as generated by
Rdindex.  Those packages contain other information in the file, which they
are allowed to do.  More precisely, read.00Index is documented as

     Read item/description information from 00Index-style files.  Such
     files are description lists rendered in tabular form, and
     currently used for the object, data and demo indices and `TITLE'

and that's not required.


On Tue, 22 Jan 2002 kleiweg@let.rug.nl wrote:
>
> When I do:
>
>     > data()
>
> ... I get:
>
>     Data sets in package `base':
>
>     Formaldehyde            Determination of Formaldehyde concentration
>
> [cut]
>
>     women                   Heights and Weights of Women
>
>
>     Use `data(package = .packages(all.available = TRUE))'
>     to list the data sets in all *available* packages.
>
>
>
> When I do as suggested:
>
>     > data(package = .packages(all.available = TRUE))
>
> ... I get:
>
>     Error in FUN(X[[2]], ...) : subscript out of bounds
>     In addition: Warning message:
>     packages `class', `ctest', `eda', `foreign', `lqs',
>     	`methods', `mgcv', `nnet', `splines', `stepfun',
`tcltk',
>     	`tools' contain no datasets in: data(package >     
.packages(all.available = TRUE))
>
>
> Packages that cause trouble:
>
>     > data(package = "boot")
>     Error in FUN(X[[2]], ...) : subscript out of bounds
>
>     > data(package = "rpart")
>     Error in FUN(X[[2]], ...) : subscript out of bounds
>
>     > data(package = "spatial")
>     Error in FUN(X[[2]], ...) : subscript out of bounds
>
>
> Version:
>  platform = i586-pc-linux-gnu
>  arch = i586
>  os = linux-gnu
>  system = i586, linux-gnu
>  status >  major = 1
>  minor = 4.0
>  year = 2001
>  month = 12
>  day = 19
>  language = R
>
> Search Path:
>  .GlobalEnv, package:ctest, Autoloads, package:base
>
>
>
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595


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