import numpy as np

data1 = np.genfromtxt('test50dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data2 = np.genfromtxt('test60dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data3 = np.genfromtxt('test70dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data4 = np.genfromtxt('test80dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data5 = np.genfromtxt('test90dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data6 = np.genfromtxt('test100dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)
data7 = np.genfromtxt('test110dBm_various_data_rate.csv', delimiter=',',usecols=(0,1), skip_header=1)

plt.plot(data1, data2, data3, data4, data5, data6, data7, 'o-')