import numpy as np
import matplotlib.pyplot as plt

data = np.genfromtxt('my_db.csv', delimiter=',',usecols=(1,2,3),names=['z','y','x'])

plt.xlabel('Longitude')
plt.ylabel('Latitude')

x = data['x']
y = data['y']
z = data['z']

plt.scatter(x,y,c=z, alpha=0.5)
plt.colorbar(label='RSS [dBm]')
plt.show()
#plt.savefig('confusion_matrix.png', format='png')