Hello,
I have problem with last version of R and rpy classic, so i try to convert
my source code into rpy2, but i have problem to understand with calling
function into a function
Exemple with my db connection :
*
With rpy classic, it's ok : *
rpy.set_default_mode(rpy.NO_CONVERSION)
r('conn <- dbConnect(PgSQL(), host="localhost", dbname="simpop",
user="postgres", password="postgres")')
*
With rpy2, error :*
import rpy2.robjects as robjects
import sys
import math
r = robjects.r
r.library("Rdbi")
r.library("RdbiPgSQL")
r.library("ggplot2")
#Connect to DB with RPY2
rconn = r.dbConnect
bdobj = r.PgSQL
print bdobj
conn = rconn( bdobj, host="localhost", dbname="simpop", user="postgres",
password="postgres")
*
At execution : *
function ()
{
out <- list(description = "PostgreSQL object")
class(out) <- c("PgSQL", "Rdbi")
return(out)
}
<environment: namespace:RdbiPgSQL>
Error in dbConnect.default(function () : Invalid database class
Traceback (most recent call last):
File "s_ranktail_resume_rpy2.py", line 19, in <module>
conn = rconn( bdobj, host="localhost", dbname="simpop", user="postgres",
password="postgres")
File "/usr/lib/python2.5/site-packages/rpy2/robjects/__init__.py", line
422, in __call__
res = super(RFunction, self).__call__(*new_args, **new_kwargs)
rinterface.RRuntimeError: Error in dbConnect.default(function () : Invalid
database class
I don't understand where is the problem ?
Thx a lot with a newbie on python/R/Rpy2
Seb
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