我转换一个熊猫DF至r使用以下:熊猫 - 如何将r数据框转换回熊猫?
import pandas as pd
import pandas.rpy.common as com
import rpy2.robjects as ro
from rpy2.robjects.packages import importr
rdf = com.convert_to_r_dataframe(df)
如何转换RDF回大熊猫DF?
df = f(rdf) ?
我转换一个熊猫DF至r使用以下:熊猫 - 如何将r数据框转换回熊猫?
import pandas as pd
import pandas.rpy.common as com
import rpy2.robjects as ro
from rpy2.robjects.packages import importr
rdf = com.convert_to_r_dataframe(df)
如何转换RDF回大熊猫DF?
df = f(rdf) ?
鉴于你的进口,这似乎是:
com.convert_robj(rdf)
例如,
In [480]: dfrm
Out[480]:
A B C
0 0.454459 49.916767 1
1 0.943284 50.878174 1
2 0.974856 50.335679 2
3 0.776600 50.782104 1
4 0.553895 50.084505 1
5 0.514018 50.719019 2
6 0.915413 50.513962 0
7 0.771571 49.859855 2
8 0.068619 49.409657 0
9 0.728141 50.945174 2
10 0.388115 47.879653 1
11 0.960172 49.680258 0
12 0.015216 50.067968 0
13 0.495024 50.286287 1
14 0.565954 49.909771 1
15 0.992279 49.009696 1
16 0.179934 49.554256 0
17 0.521243 47.854791 0
18 0.551241 51.076262 1
19 0.713271 49.418503 0
20 0.801716 50.660304 1
In [481]: rdfrm = com.convert_to_r_dataframe(dfrm)
In [482]: rdfrm
Out[482]:
<DataFrame - Python:0x14905cf8/R:0x1600ee98>
[FloatVector, FloatVector, IntVector]
A: <class 'rpy2.robjects.vectors.FloatVector'>
<FloatVector - Python:0xf9d0b00/R:0x140e2620>
[0.454459, 0.943284, 0.974856, ..., 0.551241, 0.713271, 0.801716]
B: <class 'rpy2.robjects.vectors.FloatVector'>
<FloatVector - Python:0xf9d0878/R:0x125aa240>
[49.916767, 50.878174, 50.335679, ..., 51.076262, 49.418503, 50.660304]
C: <class 'rpy2.robjects.vectors.IntVector'>
<IntVector - Python:0x11fceef0/R:0x13f0d918>
[ 1, 1, 2, ..., 1, 0, 1]
In [483]: com.convert_robj(rdfrm)
Out[483]:
A B C
0 0.454459 49.916767 1
1 0.943284 50.878174 1
2 0.974856 50.335679 2
3 0.776600 50.782104 1
4 0.553895 50.084505 1
5 0.514018 50.719019 2
6 0.915413 50.513962 0
7 0.771571 49.859855 2
8 0.068619 49.409657 0
9 0.728141 50.945174 2
10 0.388115 47.879653 1
11 0.960172 49.680258 0
12 0.015216 50.067968 0
13 0.495024 50.286287 1
14 0.565954 49.909771 1
15 0.992279 49.009696 1
16 0.179934 49.554256 0
17 0.521243 47.854791 0
18 0.551241 51.076262 1
19 0.713271 49.418503 0
20 0.801716 50.660304 1
随着文档:
In [475]: com.convert_robj?
Type: function
String Form:<function convert_robj at 0x13e85848>
File: /mnt/epd/7.3-2_pandas0.12/lib/python2.7/site-packages/pandas/rpy/common.py
Definition: com.convert_robj(obj, use_pandas=True)
Docstring:
Convert rpy2 object to a pandas-friendly form
Parameters
----------
obj : rpy2 object
Returns
-------
Non-rpy data structure, mix of NumPy and pandas objects
转换数据帧之间来回rpy2
和pandas
将在rpy2版本2.4.0,并应高度自动化(无需显式转换,它会在飞行中进行)
from rpy2.robjects import pandas2ri
pandas2ri.activate()
如果希望显式地转换为任何原因,功能pandas2ri.py2ri()
和pandas2ri.ri2py()
(它们是pandas2ri.pandas2ri()
和pandas2ri.ri2pandas()
)。
正如lgautier所建议的那样,可以使用pandas2ri
来完成。
这里是转换RPY数据帧(rdf
)到数据帧大熊猫示例代码(pd_df
):
from rpy2.robjects import pandas2ri
pd_df = pandas2ri.ri2py_dataframe(rdf)
'pandas.rpy'在大熊猫0.20除去 –