text_html_output_1.png
import pandas as pd # data processing, CSV file I/O (e.g. pd.read_csv)

data = pd.read_csv('/kaggle/input/playground-series-s3e15/data.csv')
sample = pd.read_csv('/kaggle/input/playground-series-s3e15/sample_submission.csv')
original = pd.read_csv('/kaggle/input/predicting-heat-flux/Data_CHF_Zhao_2020_ATE.csv')

train = pd.concat([data, original])

test = train[train['x_e_out [-]'].isnull()]
train = train[train['x_e_out [-]'].notnull()]

train.head()