import numpy as np

M = np.loadtxt('hastighetsdata.txt', delimiter=' ')

tid = M[:, 0] 
hastighet_km_h = M[:, 1]

hastighet = hastighet_km_h/3.6  # From km/h to m/s

dt = tid[1] - tid[0]  # sec


integral = 0.5*(hastighet[0] + hastighet[-1])*dt

for i in range(1, len(hastighet)-1, 1):      
    integral = integral + hastighet[i]*dt

s = integral
print('s [m] =', f'{s:.2f}')