R-alpha: ISO Latin1 and Readline
Fri, 13 Jun 1997 07:03:39 +0200
>>>>> Ross Ihaka writes:
> Does anyone have experience with using the readline library in
> conjunction with ISO Latin1 characters?
> In response to a prod from Martin Maechler I am trying to convert R so
> that it will accept 8-bit characters (and render them correctly in text
> and graphics). This appears to work when I type such lines into a file
> and source it, but readline seems to intercept any 8-bit characters
> I type interactively and refuses to let them through to R.
> Is this cured if you have the right kind of keyboard?
I have e.g.
hornik@aragorn:/var/tmp/hornik$ cat =E4=F6=FC.dat=20
1 2 3
4 5 6
R> x <- read.table("/var/tmp/hornik/=E4=F6=FC.dat")
V1 V2 V3
1 1 2 3
2 4 5 6
I think the trick is that you need to have the readline init file
(INPUTRC, typically something like /etc/inputrc) specify
# don't strip characters to 7 bits when reading
set input-meta on
# allow iso-latin1 characters to be inserted rather than converted t=
# prefix-meta sequences
set convert-meta off
# display characters with the eighth bit set directly rather than
# as meta-prefixed characters
set output-meta on
(comments from the readline/info sample file, the settings are what we
use here ...).
> Additional query: Should accented characters be allowed in variable
Not sure. Maybe yes so that e.g. if I had to impress someone in
Austrian I could use "Gr=F6=DFe" as a variable name ...
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