Python：RRuntimeError：（函数（data = NA，dim = length（data），dimnames = NULL）中的错误：'dims'不能长度为0

问题描述：

我想从python调用R函数，但由于某种原因我还不知道，我得到当我转换数字至R，而不是一个矩阵（数据帧）和rPython：RRuntimeError：（函数（data = NA，dim = length（data），dimnames = NULL）中的错误：'dims'不能长度为0

例如一个RRuntimeError，考虑下面简单的例子

import rpy2.robjects as robjects, pandas as pd, numpy as np 
from rpy2.robjects import r 
from rpy2.robjects.numpy2ri import numpy2ri 
from rpy2.robjects.packages import importr 

df= pd.DataFrame(np.random.random((108, 2)), columns=['Number1','Number2']) 
p = 3 

resi1=np.array(df, dtype=float) 
p1=np.array(p, dtype=float) 

r_resi = numpy2ri(resi1) 
r_p1= numpy2ri(p1)

则输出是

--------------------------------------------------------------------------- 
RRuntimeError        Traceback (most recent call last) 
<ipython-input-1-7970a0b7c100> in <module>() 
    11 
    12 r_resi = numpy2ri(resi1) 
---> 13 r_p1= numpy2ri(p1) 

D:\Anaconda3\lib\site-packages\rpy2\robjects\numpy2ri.py in numpy2ri(o) 
    80   #FIXME: no dimnames ? 
    81   #FIXME: optimize what is below needed/possible ? (other ways to create R arrays ?) 
---> 82   res = rinterface.baseenv['array'](vec, dim=dim) 
    83  # R does not support unsigned types: 
    84  elif o.dtype.kind == 

"u": 

RRuntimeError: Error in (function (data = NA, dim = length(data), dimnames = NULL) : 
    'dims' cannot be of length 0

我不确定这里发生了什么问题？

答

转换器numpy数组 - > R数组需要数组的维数。这里没有：

>>> p1 
array(3.0) 
>>> p1.shape 
()

Python：RRuntimeError：（函数（data = NA，dim = length（data），dimnames = NULL）中的错误：'dims'不能长度为0

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