On 2011-05-19 22:27, Thomas Kluyver wrote:
On 19 May 2011 21:08, Laurent Gautier <lgaut...@gmail.com
<mailto:lgaut...@gmail.com>> wrote:
>>> ri.NA_Real
NA_real_
>>> import sys
>>> sys.version
'2.7.1+ (r271:86832, Mar 24 2011, 00:37:39) \n[GCC 4.5.2]'
OK, that's interesting:
>>> ri.NA_Real
0.0
>>> sys.version
'2.7.1+ (r271:86832, Apr 11 2011, 18:05:24) \n[GCC 4.5.2]'
The value of NA_Real can be displayed as 0.0, or as a very small float
(e-41 or smaller), which can change on different runs.
Well, technically there is a numerical value behind NA_Real; it is an
"NA" by convention.
The annoying part is that this is changing from run to run: this is
suggesting uninitialized memory.
Does
>>> import ri
>>> ri.R_VERSION_BUILD
correspond to the R version you are running rpy2 against ?
Do you have older versions of rpy2 installed ? If yes, does removing
them solve the problem ?
It also gives me another problem: after rpy2.rinterface (or
rpy2.robjects) has been imported, doing any more imports fails with a
SyntaxError. It's not 100% consistent, but I can reproduce it quite a
few times in a row (closing and relaunching the interactive
interpreter). This only seems to be the case in 2.7 - I can't
reproduce it in 3.2.
>>> import rpy2.robjects
>>> import sys
File "<stdin>", line 1
import sys
^
SyntaxError: invalid syntax
Thomas
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