R help - Apr 2014 - ff package: problem with reading in numerical values

I'm trying to read in a fairly large (3.5 Gb) csv file into R, using the
read.csv.ffdf() function from the ff package.

Whenever the function comes up to a numerical value (such as 40.0, or 2 -
doesn't mater if there is a decimal point or not), it throws the following
error:

Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,  :
  scan() expected 'a real', got '"15"'


I've tried reading in a very similar file, albeit much smaller, using the
basic read.csv() function, and it loads correctly. But if I try loading it
with read.csv.ffdf(), it throws the same error.

Any ideas? Thanks!

Srdjan Santic

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Can you paste the line of data which caused the error?

It will be much easier for other people to help you.

Best,

KK


On Thu, Apr 3, 2014 at 6:35 AM, Srdjan Santic
<srdjan.santic@gmail.com>wrote:
> I'm trying to read in a fairly large (3.5 Gb) csv file into R, using
the
> read.csv.ffdf() function from the ff package.
>
> Whenever the function comes up to a numerical value (such as 40.0, or 2 -
> doesn't mater if there is a decimal point or not), it throws the
following
> error:
>
> Error in scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings,
>  :
>   scan() expected 'a real', got '"15"'
>
>
> I've tried reading in a very similar file, albeit much smaller, using
the
> basic read.csv() function, and it loads correctly. But if I try loading it
> with read.csv.ffdf(), it throws the same error.
>
> Any ideas? Thanks!
>
> Srdjan Santic
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Qiang Kou
qkou@umail.iu.edu
School of Informatics and Computing, Indiana University

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