[Rd] crash with scan(..., what=list(,,)) (PR#802)

Duncan Murdoch murdoch@stats.uwo.ca
Fri, 05 Jan 2001 11:45:31 -0500

On Fri, 5 Jan 2001 17:11:13 +0100 (MET), you wrote in message

>When reading a file with scan(), the following crashes R under Solaris and
>WinNT 4.0 (versions below):
>> ads <- scan("Bltiadu.dat", what=list(,,))

I crash Win98 with the same sort of line; it's because list(,,) is the
same as list(), and scan isn't checking for this boundary case, I

>Would an error message be more logical? Note that the followings work (the
>data file has 201 lines and 3 columns):
>> ads <- scan("Bltiadu.dat", what=list(0,,))
>Read 603 lines

While fixing this, wouldn't it be better to change this message to 

"Read 603 cases"

since in fact, only 201 lines were read, 3 cases per line?

Duncan Murdoch
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