video29.py

# -*- coding: utf-8 -*-
"""Video29.ipynb

Automatically generated by Colaboratory.

Original file is located at
    https://colab.research.google.com/drive/1RF2DLb_vxLph8Z392NUUjSzkPv5d8UqD
"""

import numpy as np

x = np.array([1,2,3,4])

y = np.array([2,5,6,0])

x+y

x-y

x*y

x.dot(y)

r = np.array([[1,2,3],
              [4,5, -7.6]])

r

x[1]

r[1,1]

x[1:3]

x[1:]

import matplotlib.pyplot as plt

x = np.array([1,6,7,8,9])
y = 2*x
z = 3*x - 1
m = 5*x - 1
plt.plot(x,m, c='blue')
plt.plot(x,z, c='red')

n = 100
x = np.linspace(0,10,n)

x

yp = 2*x

yp

y = 2*x + np.random.normal(0,1, size = n)

y

y - yp

plt.scatter(x,y)