From ripley@stats.ox.ac.uk  Sun Dec 31 07:55:23 2000
From: ripley@stats.ox.ac.uk (ripley@stats.ox.ac.uk)
Date: Sun, 31 Dec 2000 08:55:23 +0100 (MET)
Subject: [Rd] editor in Windows doesn't like a data frame with row names (PR#798)
Message-ID: <200012310755.IAA06563@pubhealth.ku.dk>

On Sun, 31 Dec 2000 jfox@mcmaster.ca wrote:

> The editor in R version 1.2.0 returns an error after editing a data frame 
> that has row names. This is on a Windows 2000 system, but I've encountered 
> the same problem under Windows 95. Here's a simple example:

Actually, that's not where the error is. If you use traceback() you
will see it is in edit.data.frame.  That tries to use row.names to set the
rownames on a list, which no longer works (and was never documented to).

The fix is to use

    out <- as.data.frame(out)
    if (edit.row.names) {
        if (any(duplicated(rn))) 
            warning("edited row names contain duplicates and will be
ignored")
        else row.names(out) <- rn
    }
    out

or, if you don't want to edit the row names,

edit(foo, edit.row.names = FALSE)

BTW, you are supposed to use row.names to get/set row names on data frame,
and rownames/colnames on a matrix.


> 
>   ------------------------------------------------------------------------------------
> 
> R : Copyright 2000, The R Development Core Team
> Version 1.2.0  (2000-12-15)
> 
> R is free software and comes with ABSOLUTELY NO WARRANTY.
> You are welcome to redistribute it under certain conditions.
> Type `license()' or `licence()' for distribution details.
> 
> R is a collaborative project with many contributors.
> Type `contributors()' for more information.
> 
> Type `demo()' for some demos, `help()' for on-line help, or
> `help.start()' for a HTML browser interface to help.
> Type `q()' to quit R.
> 
>  > data(Formaldehyde)
>  > Formaldehyde
>    carb optden
> 1  0.1  0.086
> 2  0.3  0.269
> 3  0.5  0.446
> 4  0.6  0.538
> 5  0.7  0.626
> 6  0.9  0.782
>  > edit(Formaldehyde) # no problem here
>    carb optden
> 1  0.1  0.086
> 2  0.3  0.269
> 3  0.5  0.446
> 4  0.6  0.538
> 5  0.7  0.626
> 6  0.9  0.782
>  > rownames(Formaldehyde)
> [1] "1" "2" "3" "4" "5" "6"
>  > rownames(Formaldehyde)<-letters[1:6]
>  > Formaldehyde # seems ok
>    carb optden
> a  0.1  0.086
> b  0.3  0.269
> c  0.5  0.446
> d  0.6  0.538
> e  0.7  0.626
> f  0.9  0.782
>  > edit(Formaldehyde) # I simply closed the editor without changing anything
> Error in rownames<-(x, value) : dimnames applied to non-array
>  >
> 
> 
> --please do not edit the information below--
> 
> Version:
>   platform = i386-pc-mingw32
>   arch = x86
>   os = Win32
>   system = x86, Win32
>   status =
>   major = 1
>   minor = 2.0
>   year = 2000
>   month = 12
>   day = 15
>   language = R
> 
> Windows 0.0 (build 0) Service Pack 10.0 ()
> 
> Search Path:
>   .GlobalEnv, package:car, 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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[Rd] editor in Windows doesn't like a data frame with row names (PR#798)
ripley@stats.ox.ac.uk