Did you try the example described on the ff man page?

On Monday, April 2, 2012, Bond, Stephen wrote:

> Thomas,
>
> I tried biglm and it does not work see
>
>
> http://r.789695.n4.nabble.com/unable-to-get-bigglm-working-ATTN-Thomas-Lumley-td2276524.html#a2278381
>
> . There are other posts from people who cannot get biglm working and
> others who get strange results.
> Please, advise if you can help.
> I have row based native code which works, but it is inconvenient as it
> does not produce an R object, which can be fed to anova etc. offered it to
> the developer forum, but message is still waiting for mod approval.
> regards
>
> Stephen B
>
> -----Original Message-----
> From: Thomas Lumley [mailto:tlumley@uw.edu <javascript:;>]
> Sent: Friday, March 30, 2012 7:32 PM
> To: Bond, Stephen
> Cc: r-help@r-project.org <javascript:;>
> Subject: Re: [R] ff usage for glm
>
> On Sat, Mar 31, 2012 at 9:05 AM, Bond, Stephen <Stephen.Bond@cibc.com<javascript:;>>
> wrote:
> > Greetings useRs,
> >
> > Can anyone provide an example how to use ff to feed a very large data
> frame to glm?
> > The data.frame cannot be loaded in R using conventional read.csv as it
> is too big.
> >
> > glm(...,data=ff.file) ??
> >
>
> I shouldn't think glm() will work on data that are too big to read into R.
>  However, bigglm() from the biglm package should work.  You just need to
> write a function that supplies chunks of data from ff.file as requested
> (see the example on ?bigglm).  I haven't used ff, but it looks from the
> documentation as though chunk() will do all the difficult parts.
>
>  -thomas
>
> --
> Thomas Lumley
> Professor of Biostatistics
> University of Auckland
>
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