Hi all,
I recently switched to R version 2.6.2 (from 2.5.0 I was using) on Windows XP.
I have a fair amount of previous data saved in the form of "approxfun" objects
created by version 2.5.0, with code basically like this:
> x <- rlnorm(100,10,2)
> f <- approxfun(1:100,x)
> f(5)
[1] 313811.3
> save(f, file="mytest_approx.Rdata")
Now on 2.6.2, when I try to reuse the saved object I get an error:
> attach("mytest_approx.Rdata")
> f(5)
Error in .C("R_approx", as.double(x), as.double(y), as.integer(n), xout =
as.double(v), :
C symbol name "R_approx" not in DLL for package "base"
If I create the approxfun in 2.6.2 and use it in 2.5.0, I get a "mirrored"
error:
Error in .C("R_approx", as.double(x), as.double(y), as.integer(n), xout =
as.double(v), :
C symbol name "R_approx" not in DLL for package "stats"
It seems to me the two versions of R are looking for the same thing in
different places, is it because of the environment they carry?
Can anyone suggest a way to work around this situation?
Thanks,
Roberto
----
Roberto Ugoccioni
Intesa Sanpaolo SpA
Servizio Operational Risk Management
Ufficio Sviluppo e Gestione del Sistema ORM
Via Monte di Pietà 26
10122 Torino
Italy
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