我想通过使用Python 2.6.5和R 10.0的RPY2运行rpart。rpy2的问题,rpart从python正确传递数据到r
我在Python中创建一个数据帧并一起传递,但我得到一个错误,指出:
Error in function (x) : binary operation on non-conformable arrays
Traceback (most recent call last):
File "partitioningSANDBOX.py", line 86, in <module>
model=r.rpart(**rpart_params)
File "build/bdist.macosx-10.3-fat/egg/rpy2/robjects/functions.py", line 83, in __call__
File "build/bdist.macosx-10.3-fat/egg/rpy2/robjects/functions.py", line 35, in __call__
rpy2.rinterface.RRuntimeError: Error in function (x) : binary operation on non-conformable arrays
谁能帮助我确定我在做什么错抛出这个错误?
我的代码的相关部分是这样的:
import numpy as np
import rpy2
import rpy2.robjects as rob
import rpy2.robjects.numpy2ri
#Fire up the interface to R
r = rob.r
r.library("rpart")
datadict = dict(zip(['responsev','predictorv'],[cLogEC,csplitData]))
Rdata = r['data.frame'](**datadict)
Rformula = r['as.formula']('responsev ~.')
#Generate an RPART model in R.
Rpcontrol = r['rpart.control'](minsplit=10, xval=10)
rpart_params = {'formula' : Rformula, \
'data' : Rdata,
'control' : Rpcontrol}
model=r.rpart(**rpart_params)
两个变量cLogEC和csplitData是浮动式的numpy的阵列。
另外,我的数据帧看起来像这样:
In [2]: print Rdata
------> print(Rdata)
responsev predictorv
1 0.6020600 312
2 0.3010300 300
3 0.4771213 303
4 0.4771213 249
5 0.9242793 239
6 1.1986571 297
7 0.7075702 287
8 1.8115750 270
9 0.6020600 296
10 1.3856063 248
11 0.6127839 295
12 0.3010300 283
13 1.1931246 345
14 0.3010300 270
15 0.3010300 251
16 0.3010300 246
17 0.3010300 273
18 0.7075702 252
19 0.4771213 252
20 0.9294189 223
21 0.6127839 252
22 0.7075702 267
23 0.9294189 252
24 0.3010300 378
25 0.3010300 282
和式看起来像这样:
In [3]: print Rformula
------> print(Rformula)
responsev ~ .
R中的数据帧是列表。也许你应该将数组传递给数组或矩阵? – 2010-12-14 01:58:56
我尝试传递矩阵,但也抛出了错误。有趣的是,如果我将r.plsr替换为r.rpart,它可以很好地工作,rpart和plsr都会说他们需要数据作为data.frame .... – mishaF 2010-12-14 02:48:55