On 3/18/10 3:03 PM, Luca Beltrame wrote:
> Hello,
>
> I just updated to beta 1, and I found a problem with some of the translated
> parameters in functions.
>
> Test case:
>
> from rpy2.robjects.packages import importr
>
> base = importr("base")
>
> sequence = list(base.seq(-10, 0, length_out=2))
> len(sequence)
>
> Result: 11 # wrong
>
> parameter = {"length.out":2}
> sequence = list(base.seq(-10, 0, **parameter))
> len(sequence)
>
> Result: 2 # Correct
>
> Is this a bug?
In a way. This is because of particularities with R.
"length_out" is only defined as a parameter in base.seq_int(), and
base.seq() is calling base.seq_int(). "length_out" is passed on to
seq_int() as part of the "..." (R's ellipsis), and therefore cannot be
guessed during the translation.
base.seq_int() will behave like you expect.
There is a way to manually force base.seq to translate "length_out" to
"length.out" (but that might break other things).
> If so, where should I report it?
>
About bug reports:
http://rpy.sourceforge.net/rpy2_bugs.html
Hoping this helps,
Laurent
>
>
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