def call_r(df):
'''
Arguments:
df: A string replicating a CSV file. The observations for the dependent
variable MUST be in the FIRST COLUMN
Returns: an rpy2 Robject float vector which stores the coefficients of the
linear regression
'''
from rpy2.robjects.packages import SignatureTranslatedAnonymousPackage
from io import StringIO
from rpy2.robjects import DataFrame
from rpy2.robjects import FloatVector
import rpy2.rinterface as ri
ri.initr()
file_like_obj = StringIO(df)
constructor_dict = parser(file_like_obj)
rpy2_dataframe = DataFrame(constructor_dict)
with open('regression_app\linear_modeler_function.R') as f:
str = f.read()
mod = SignatureTranslatedAnonymousPackage(str, 'mod')
a = mod.linear_modeler(rpy2_dataframe)
del mod
return a
