Я абсолютный новичок в программировании на Python и в настоящее время изучаю основную статистику по нему.
Я столкнулся с
"PatsyError: Коэффициент оценки ошибки: NameError:"
на код с pred = model.predict(pd.DataFrame(calo['wt'])
Ниже мой код:
# For reading data set
# importing necessary libraries
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
# reading a csv file using pandas library
calo=pd.read_csv("/Users/Sanjeev/Desktop/Excel R Assignments/Simple Linear Regression/calories_consumed.csv")
calo.columns = ['wt','cal']
np.corrcoef(calo.wt,calo.cal)
plt.plot(calo.wt,calo.cal,"bo");plt.xlabel("WEIGHT");plt.ylabel("CALORIES")
# For preparing linear regression model we need to import the statsmodels.formula.api
import statsmodels.formula.api as smf
model = smf.ols("wt~cal",data=calo).fit()
# For getting coefficients of the varibles used in equation
model.params
# P-values for the variables and R-squared value for prepared model
model.summary()
model.conf_int(0.05) # 95% confidence interval
pred = model.predict(pd.DataFrame(calo['wt']))
Это выдает ошибку:
Traceback (most recent call last):
File "<ipython-input-43-4fcbf1ee1921>", line 1, in <module>
pred = model.predict(pd.DataFrame(calo['wt']))
File "/anaconda3/lib/python3.7/site-packages/statsmodels/base/model.py", line 837, in predict
exog = dmatrix(design_info, exog, return_type="dataframe")
File "/anaconda3/lib/python3.7/site-packages/patsy/highlevel.py", line 291, in dmatrix
NA_action, return_type)
File "/anaconda3/lib/python3.7/site-packages/patsy/highlevel.py", line 169, in _do_highlevel_design
return_type=return_type)
File "/anaconda3/lib/python3.7/site-packages/patsy/build.py", line 888, in build_design_matrices
value, is_NA = _eval_factor(factor_info, data, NA_action)
File "/anaconda3/lib/python3.7/site-packages/patsy/build.py", line 63, in _eval_factor
result = factor.eval(factor_info.state, data)
File "/anaconda3/lib/python3.7/site-packages/patsy/eval.py", line 566, in eval
data)
File "/anaconda3/lib/python3.7/site-packages/patsy/eval.py", line 551, in _eval
inner_namespace=inner_namespace)
File "/anaconda3/lib/python3.7/site-packages/patsy/compat.py", line 43, in call_and_wrap_exc
exec("raise new_exc from e")
File "<string>", line 1, in <module>
PatsyError: Error evaluating factor: NameError: name 'cal' is not defined
wt~cal
^^^
Нужна ваша помощь, чтобы решить эту проблему.
Заранее спасибо.:)