How to set an attribute to a vector in rpy2

Question

How to add attributes to vectors in python with rpy2. As an example how can I reproduce this R code:

library(evir)
pot<-c(2.0,3.2,4,5,6,7)
ts<-c(1,6,7,19,20,30)
attr(pot,"times")<-ts
output<-decluster(pot,run=2)

I can't find any help after searching several hours on the net. I guess Laurent has the answer ;-)

Answer 1

Use the attribute slots. What is described about it in the doc for S4 objects applies to attributes (http://rpy2.readthedocs.org/en/version_2.7.x/notebooks/s4class.html).

Here it should work with:

from rpy2.robjects.vectors import FloatVector, IntVector
pot = FloatVector((2.0, 3.2, 4, 5, 6, 7))
ts = IntVector((1,6,7,19,20,30))
pot.slots['times'] = ts

For rpy2 < 2.7, you should use do_slot_assign :

pot.do_slot_assign("times",ts)