[R] HELP: ff package

[BH]

I use the ff-package for large data and have good success in session.  To
ensure my data is available for the next R session, I save my workspace and
use the /ffsave/ command to archive my large data objects.  Syntax is
simple:

> ffsave(file="~/path/archiveName", list="objectName")

when I have multiple files to save, the list is expanded using c().  When I
start a new R session, I load the ff-package again and use /ffload/ to
retrieve my data. Syntax is simple:

> ffload(file="~/path/archiveName", list="objectName")

If my workspace is emply, I can see the object enter.  However, when I wish
to interrogate the object, it appears that  I have no physical connection to
the data:

> objectName
ff (deleted) double length=21024 (21024) dim=c(73,144,2) dimorder=c(1,2,3)
> open(objectName)
Error: file.access(filename, 0) == 0 is not TRUE

In simple words, my data is no longer usable...WHY?  This shouldn't be so
hard!

 

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