From davison at stats.ox.ac.uk  Tue Jun 26 18:24:37 2007
From: davison at stats.ox.ac.uk (Dan Davison)
Date: Tue, 26 Jun 2007 17:24:37 +0100
Subject: [Rd] possible bug in 'scan'
In-Reply-To: <5f88b2c50706260858q1bfaa2e0tf62cb0694d01c4c1@mail.gmail.com>
References: <5f88b2c50706260858q1bfaa2e0tf62cb0694d01c4c1@mail.gmail.com>
Message-ID: <20070626162437.GA12214@stats.ox.ac.uk>

Hi Ben,

On Tue, Jun 26, 2007 at 11:58:35AM -0400, Benjamin Tyner wrote:
> R-devel,
> 
> When I run the following code on the attached file,
> 
> tmp <- scan("C:/temp.csv",
>            what=list("character","numeric"),
>            sep=",")
> 
> Then tmp[[2]] is a character vector. My impression from the help file
> is that it should be a numeric as specified by 'what'

?scan says

[...]
 what: the type of 'what' gives the type of data to be read.
[...]

so for example

what=list(character(), numeric())

would presumably have worked, but not your code, as both of your list elements are of type character.

Dan

> 
> >sessionInfo()
> R version 2.5.0 (2007-04-23)
> i386-pc-mingw32
> 
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
> States.1252;LC_MONETARY=English_United
> States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
> 
> attached base packages:
> [1] "stats"     "graphics"  "grDevices" "utils"     "datasets"
> "methods"   "base"
> 
> other attached packages:
> lattice    gdata
> "0.15-5"  "2.3.1"
> 
> My apologies if this is due to my misunderstanding.
> Ben

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[Rd] possible bug in 'scan'
Dan Davison