for loop과 fig, ax 사용하여 그림 그리기

import pandas as pd

import matplotlib.pyplot as plt

df={'channel': ['a', 'a', 'a', 'a','b','b','b','b'],

        'x': [1, 2, 3, 4,5,6,7,8],

        'y1':[10,20,30,40,50,60,70,80],

        'y2':[20,40,60,80, 100, 120, 140, 160],

        'y3':[30,60,90,120, 160, 180, 190, 200]

        }

df=pd.DataFrame(df)

channel_list = df.channel.unique()

nrow=len(df.channel.unique())

ncol=2

fig, ax = plt.subplots(nrow,ncol,figsize=(10,15))

for a,channel in enumerate(channel_list):

    ax[a,0].plot(df.loc[df.channel==channel,'x'], df.loc[df.channel==channel,'y1'], color='g', label='raw rfu')

    ax[a,0].legend()

    ax[a,0].set_title('title = {}'.format(channel))

    #overlaying y2 and y3 into a single plot

    ax[a,1].plot(df.loc[df.channel==channel,'x'], df.loc[df.channel==channel,'y2'], color='r', label='y2')

    ax[a,1].plot(df.loc[df.channel==channel,'x'], df.loc[df.channel==channel,'y3'], color='b', label='y3')

    ax[a,1].legend()

plt.show()

plt.clf()