# -*- coding: utf-8 -*-
"""
Created on Tue Dec 10 14:16:22 2019

@author: usbo2
"""

import numpy as np
import scipy as sp

def concatenate_bin(x):
   return( (x[0] << 3*8) + (x[1] <<2*8 ) + (x[2] << 1*8)  + (x[3] ) )

a=np.random.randint(-128,128,1000)
ra=a.reshape((int(len(a)/4),4 ))

res=concatenate_bin(ra)