Thanks Marc,
Indeed my data is in the wrong class! I understand that it needs to be a matrix
for barplot, but when I try to convert my list to a matrix, it doesnt seem to
convert. How do I get the matrix() function (or array for that matter) working
properly for me!
The code below shows what I mean:
from rpy import r
import numpy
r.png('output_r_test.png')
bars = numpy.array([[25,15,26,25,18],[45,32,28,12,45]])
r.print_(bars)
print r.class_(bars)
mat = r.matrix([25, 15, 26, 25, 18, 45, 32, 28, 12, 45],byrow=True,nrow=2)
r.print_(mat)
print r.class_(mat)
r.barplot(r.matrix(mat))
r.dev_off()
Output:
[[1]]
[1] 25 15 26 25 18
[[2]]
[1] 45 32 28 12 45
list
[[1]]
[1] 25 15 26 25 18
[[2]]
[1] 45 32 28 12 45
list
Traceback (most recent call last):
File "C:\r_test\test.py", line 13, in <module>
r.barplot(r.matrix(mat))
rpy.RPy_RException: Error in -0.01 * height : non-numeric argument to binary
operator
Thanks for your help,
Krysta
> Date: Fri, 15 May 2009 19:51:05 -0500
> From: larsen...@gmail.com
> To: rpy-list@lists.sourceforge.net
> Subject: Re: [Rpy] Barplot Error: rpy.RPy_RException: Error in -0.01 * height
> : non-numeric argument to binary operator
>
> > Traceback (most recent call last):
> > File "r_test.py", line 70, in ?
> > r.barplot(bars, beside = "TRUE" )
> > rpy.RPy_RException: Error in -0.01 * height : non-numeric argument to binary
> > operator
>
> Your Numeric array is being converted into a list.
>
> >>> from rpy import r
> >>> import Numeric
> >>> r.print_(bars)
> [[1]]
> [1] 25 15 26 25 18
>
> [[2]]
> [1] 45 32 28 12 45
>
> [[25, 15, 26, 25, 18], [45, 32, 28, 12, 45]]
> >>> r.is_list(bars)
> True
>
> How about-->
>
> r.barplot(r.matrix([25, 15, 26, 25, 18, 45, 32, 28, 12,
> 45],byrow=True,nrow=2))
>
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