我试图将一列熊猫数据框转换为因子,因为我试图在R中调用的函数预计因子。将Pandas Dataframe列转换为R因子
pandas2ri.activate()
#second column of labels has to be converted to factors
labels = read_csv(path_to_csv)
as_factor = ro.r['as.factor']
output = package.function(another_df, as_factor(labels['column_name']))
以下是错误我得到:
rpy2.rinterface.RRuntimeError: Error in sort.list(y) : 'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?
我该怎么办?
重现下面的例子:
import pandas as pd
df = pd.DataFrame({'Col': [10, 20],
'x': ['Control', 'Low_Cav02']})
from rpy2 import robjects as ro
from rpy2.robjects import pandas2ri
pandas2ri.activate()
as_factor = ro.r['as.factor']
labels = as_factor(df['Col'])
print labels
labels = as_factor(df['x'])
print labels
输出:
[1] 10 20
Levels: 10 20
/Users/swetabh/Envs/damet/lib/python2.7/site-packages/rpy2/robjects/functions.py:106: UserWarning: Error in sort.list(y) : 'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?
res = super(Function, self).__call__(*new_args, **new_kwargs)
Traceback (most recent call last):
File "damet/analysis.py", line 26, in <module>
labels = as_factor(df['x'])
File "/Users/swetabh/Envs/damet/lib/python2.7/site-packages/rpy2/robjects/functions.py", line 178, in __call__
return super(SignatureTranslatedFunction, self).__call__(*args, **kwargs)
File "/Users/swetabh/Envs/damet/lib/python2.7/site-packages/rpy2/robjects/functions.py", line 106, in __call__
res = super(Function, self).__call__(*new_args, **new_kwargs)
rpy2.rinterface.RRuntimeError: Error in sort.list(y) : 'x' must be atomic for 'sort.list'
Have you called 'sort' on a list?
可以尝试显示重复的例子,我们可以运行,以及帮你? –
我不知道它是否可以解决你的问题,但R的因子相当于熊猫类:'df [“some_column”]。astype(“category”)' – ayhan
@MathieuB完成。如果这有帮助的话。 – Swetabh