import math as  m
import numpy as np
import matplotlib.pyplot as plt

a=np.loadtxt("dim2.dat")
b=np.loadtxt("kiirendus.dat")
scalep=10
widthp=0.002
n=len(a[:,0])
t=np.arange(0,n,200)
plt.quiver(a[t,1],a[t,2],a[t,3],a[t,4],angles="xy",color="black",scale_units="xy",scale=scalep,width=widthp,label="v")
plt.quiver(a[t,1],a[t,2],a[t,5],a[t,6],angles="xy",color="green",scale_units="xy",scale=scalep,width=widthp,label="a")
plt.plot(a[:,1],a[:,2],color="gray",label="traj")
plt.legend()
plt.grid()
plt.show()