Thanks!
Now,it's better it gives me my 10 points but it supposed to give me the 2 axes with values from 0-1000,but they are not.
data=[]
for i in range(0,1000,100):
mydata=(sc.array([i,rw1.MeanSquareDistance1d(i,np)])).tolist()
data.append(mydata)
print(data)
fig3=plt.figure()
x,y=sc.transpose(data)
plt.plot(x,y,'bo')
plt.show()
(It isn't affected if i do plt.axis([0, 1000, 0, 1000])