[python] python "TypeError: 'numpy.float64' object cannot be interpreted as an integer"

import numpy as np

for i in range(len(x)):
    if (np.floor(N[i]/2)==N[i]/2):
        for j in range(N[i]/2):
                pxd[i,j]=x[i]-(delta*j)*np.sin(s[i]*np.pi/180)
                pyd[i,j]=y[i]-(delta*j)*np.cos(s[i]*np.pi/180)

    else:
        for j in range((N[i]-1)/2):
                pxd[i,j]=x[i]-(delta*j)*np.sin(s[i]*np.pi/180)
                pyd[i,j]=y[i]-(delta*j)*np.cos(s[i]*np.pi/180)     

Does anyone has an idea of solving this problem? Running these codes successfully?