On Mon, 1 Sep 2008, Tim Beissbarth wrote:
Somewhere in between the R-Versions 2.6 and 2.7 the behaviour of the function
type.convert and therefore also read.table, read.csv, etc. has changed (see
below):
In 2.6 and before:
type.convert(c("+", "-", "+"))
[1] + - +
Levels: + -
In 2.7 and later:
No, 2.7.0 only.
type.convert(c("+", "-", "+"))
[1] 0 0 0
Apparently, the character strings "+" and "-" are now interpreted as numeric
and not any more as factors or character strings.
I have quite a number of files with columns that contain "+" or "-" and would
like to convert these to characters or factors, without having to specify the
individual column types manually.
Is there any way to still do so in a new version of R?
Even an old version of R (2.7.1)!
Please do note what the posting guide says about updating *before*
posting, and using proper version numbers (there is no 'R 2.7')
Many thanks and best wishes,
Tim
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--
Brian D. Ripley, [EMAIL PROTECTED]
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 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
