Bugs item #1623914, was opened at 2006-12-28 17:37
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Category: None
Group: None
>Status: Closed
>Resolution: Wont Fix
Priority: 5
Private: No
Submitted By: G�bor BORGULYA (borgulya)
>Assigned to: Gregory Warnes (warnes)
Summary: r.save fails while r("save...") works
Initial Comment:
I try to save a data.frame using R. The way I expected it to work does not
work. An other way does work though. As I see no explanation to this, I think
this is a bug.
Steps are detailed below:
1. GETTING THE DATA.FRAME
=========================
In [9]: d = r.read_DIF("spss_proba10_export.dif", header=True)
In [10]: r.class_(d).as_py(BASIC_CONVERSION)
Out[10]: 'data.frame'
2. THE SIMPLE SAVE COMMAND FAILS
================================
In [14]: r.save(d, file="spss_proba10_export.RData")
---------------------------------------------------------------------------
rpy.RException Traceback (most recent call last)
/home/gab/stat_munka/MJ/<console>
RException: Error in function (..., list = character(0), file = stop("'file'
must be specified"), :
symbol print-name too long
3. A WORKAROUND
===============
In [12]: r.assign('d', d)
Out[12]: <Robj object at 0xb7c7f210>
In [13]: r('save(d, file="spss_proba10_export.RData")')
Out[13]: <Robj object at 0xb7c7f240>
----------------------------------------------------------------------
>Comment By: Gregory Warnes (warnes)
Date: 2007-10-17 22:28
Message:
Logged In: YES
user_id=9316
Originator: NO
bourgulya wrote:
I found the error string "symbol print-name too long" in
/trunk/rpy/src/R_eval.c line 158.
I suspect that R might try to build a name for the nameless object (the
Python representation of which is called d) and somehow it gets very
long.
One of the unresolved issues in rpy is problem of separate namespaces
between r and python. When an r object defined in the python namespace is
passed to an R function that uses 'deparse(substitute())' to get the name,
the result is a complete string representation of the object itself. For
relatively large objects, this can easily become too large for an R name.
The current workaround is to put the object into the R namespace with
r.assign(name, 'value').
-g
----------------------------------------------------------------------
Comment By: G�bor BORGULYA (borgulya)
Date: 2006-12-28 18:13
Message:
Logged In: YES
user_id=131307
Originator: YES
I found the error string "symbol print-name too long" in
/trunk/rpy/src/R_eval.c line 158.
I suspect that R might try to build a name for the nameless object (the
Python representation of which is called d) and somehow it gets very long.
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