Bugs item #1602142, was opened at 2006-11-24 08:15
Message generated for change (Comment added) made by jchang
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Category: None
Group: rpy
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: none (whatsoever)
Assigned to: Gregory Warnes (warnes)
Summary: Problem to convert numeric array into matrix
Initial Comment:
I'm working with a programm that converts a numeric array into a r-matrix.
In some R and Python versions it runs fine (e.g. python 2.4.3 and R 2.1.1)
In some versions ( e.g. R 2.2.3) the array is converted into a matrix with one
column containing lists in each cell.
I'm using the module Numeric to create the array.
I solved this by converting the array into a vector and create a matrix with
the number of rows of the array, but slows down the method.
My question:
Is this solved in the newest rpy-version or solved in any other way?
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Comment By: Jeffrey Chang (jchang)
Date: 2007-08-30 20:04
Message:
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I believe I am seeing this too. I am unable to create matrices in R.
This is on rpy 1.0RC3, R 2.5.1, python 2.5.1.
I do not understand the workaround described above, so am unable to test
whether that works on my setup.
>>> M = rpy.r.matrix([1, 2, 4, 5], 2, 2)
>>> M
array([[1, 4],
[2, 5]])
>>> rpy.r.print_(M)
NULL
>>> rpy.r.print_(rpy.r.dim(M))
NULL
>>> rpy.r.print_(rpy.r.dim([[1, 2], [3, 4]]))
NULL
>>> rpy.r.print_([[1, 2], [3, 4]])
[[1]]
[1] 1 2
[[2]]
[1] 3 4
[[1, 2], [3, 4]]
>>> rpy.r.print_(rpy.r.length([[1, 2], [3, 4]]))
[1] 2
2
>>> rpy.r.print_(rpy.r.mode([[1, 2], [3, 4]]))
[1] "list"
'list'
>>>
----------------------------------------------------------------------
Comment By: Gregory Warnes (warnes)
Date: 2006-11-27 14:32
Message:
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These conversions should happen properly for all versions of RPy and R.
What platform and version of RPy are you using?
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