[Rd] order() fails on a chr object of class "AsIs" with "\265" in it

From: Don MacQueen <macq_at_llnl.gov>
Date: Fri, 15 Jan 2010 16:04:21 -0800

Here's an example (session info at the end).

> tmpv <- c('\265g/L','Bq/L')
> order(tmpv)

[1] 2 1
> tmpv <- I(tmpv)
> order(tmpv)

Error in if (xi > xj) 1L else -1L : missing value where TRUE/FALSE needed
> foov <- gsub('\265','',tmpv)
> order(foov)

[1] 2 1
> str(tmpv)

Class 'AsIs' chr [1:2] "\265g/L" "Bq/L"
> str(foov)

Class 'AsIs' chr [1:2] "g/L" "Bq/L"

I can easily work around this in my scripts, but shouldn't order() succeed with such an object?
(I suppose this could be Mac-specific, but I'm assuming it's not...)

For context:
The character "\265" causes the Greek letter mu to be displayed in various output devices. For example, the character vector eventually gets written to an html file, which when displayed in Firefox (Mac) is displayed as Greek mu. Also in Excel 2004 (Mac).

I first wrote these scripts 6 years ago, when "\265" was a way I could find to display the Greek mu in output text files of various kinds. They worked as recently as 3 months ago. Maybe there's a better way now to display a mu in text-based contexts?

> sessionInfo()

R version 2.10.1 (2009-12-14)

[1] C

attached base packages:
[1] stats graphics grDevices utils datasets methods base



Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA


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