[Rd] print problem with data frames (PR#698)

[J.C.Rougier@durham.ac.uk]

Another one from the student computer practicals: it is possible
to create a dataframe that cannot be printed.  Thus

> fred <- data.frame(happy=c(TRUE, FALSE, TRUE), sad=7:9)
> tmp <- fred[c(FALSE, FALSE, TRUE, TRUE)] # no error message!
> tmp
Error in as.matrix.data.frame(x) : dim<- length of dims do not match the length of object
> print.default(tmp)
$"NA"
NULL

$"NA"
NULL

attr(,"class")
[1] "data.frame"

This obviously relates to my previous posting to r-devel about
subscripting objects with logical vectors that are not the right
length.

Cheers, Jonathan.

--please do not edit the information below--

Version:
 platform = sparc-sun-solaris2.7
 arch = sparc
 os = solaris2.7
 system = sparc, solaris2.7
 status = 
 major = 1
 minor = 1.1
 year = 2000
 month = August
 day = 15
 language = R

Search Path:
 .GlobalEnv, Autoloads, package:base

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