[R] The behaviour of read.csv().

Rolf Turner r.turner at auckland.ac.nz
Fri Dec 3 01:26:32 CET 2010

On 3/12/2010, at 1:08 PM, Phil Spector wrote:

> Rolf -
>    I'd suggest using
>     junk <- read.csv("junk.csv",header=TRUE,fill=FALSE)
> if you don't want the behaviour you're seeing.

The point is not that I don't want this kind of behaviour.
The point is that it seems to me to be unexpected and dangerous.

I can indeed take precautions against it, now that I know about it,
by specifying fill=FALSE.  Given that I remember to do so.

Now that you've pointed it out I can see that this is the reason
for the different behaviour between read.table() and read.csv();
in read.table() fill=FALSE is effectively the default.

Having fill=TRUE being the default in read.csv() strikes me as
being counter-intuitive and dangerous.



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