Graphing a line and scatter points using Matplotlib?
- by Patrick O'Doherty
Hi guys
I'm using matplotlib at the moment to try and visualise some data I am working on. I'm trying to plot around 6500 points and the line y = x on the same graph but am having some trouble in doing so. I can only seem to get the points to render and not the line itself. I know matplotlib doesn't plot equations as such rather just a set of points so I'm trying to use and identical set of points for x and y co-ordinates to produce the line.
The following is my code
from matplotlib import pyplot
import numpy
from pymongo import *
class Store(object):
"""docstring for Store"""
def __init__(self):
super(Store, self).__init__()
c = Connection()
ucd = c.ucd
self.tweets = ucd.tweets
def fetch(self):
x = []
y = []
for t in self.tweets.find():
x.append(t['positive'])
y.append(t['negative'])
return [x,y]
if __name__ == '__main__':
c = Store()
array = c.fetch()
t = numpy.arange(0., 0.03, 1)
pyplot.plot(array[0], array[1], 'ro', t, t, 'b--')
pyplot.show()
Any suggestions would be appreciated,
Patrick
