Plotcrimes.py

#!/usr/bin/python
%matplotlib inline
import numpy as np
import matplotlib.pyplot as plt
# gives a base to x and y
x=[]
y=[]
with open("Crimes_file.txt") as f:
    data = f.read()
    data = zip(*[iter(data.split(" "))]*2)
    #x, y =data[0],data[1]    
    for a_tuple in data:  # iterates through each tuple
        for item in a_tuple:
            item = float(item)# iterates through each tuple items
            #append x value with every read
            if item >0:x.append(item)
              #append y value with every read
            if item<0:y.append(item)
#once all reading is comleted plot x,y
plt.scatter(x,y)