[R] how to change the "ff" properties of a "ff"-related R object after the original "ff" output folder has been moved

[David Winsemius]

On Jun 25, 2015, at 4:04 PM, Shi, Tao via R-help wrote:

> Hi all,
> 
> I'm new to "ff" package through the using Bioconductor package "crlmm".  Here is my problem:
> 
> I've created a few R objects (e.g. an CNSet) using crlmm based on my data and save them in a .RData file.  crlmm heavily uses ff package to store results on a local folder.  For certain reasons, I have moved the ff output folder to somewhere else.  Now when I go back to R, I can't open those CNSet, for example, anymore, as the file has a property still storing the old ff output folder path. 
> 
> My question is: is there a quick way to change these paths to the new one, so I don't have to re-run the own analysis.
> 

The way to approach this is to create a small example that illustrates teh problem. In many case all will becove clear, but if not then you will have something that you can then post ... IN R CODE ... that will let us (most of whom are not ff-urers) see the problem.

--
David Winsemius
Alameda, CA, USA