Exercise

Create a decision boundary

The dataset you created in the previous exercise is available to you in the dataframe df (recall that it consists of two uniformly distributed variables x1 and x2, lying between 0 and 1). In this exercise you will add a class variable to that dataset. You will do this by creating a variable y whose value is -1 or +1 depending on whether the point (x1, x2) lies below or above the straight line that passes through the origin and has slope 1.4.

Instructions

100 XP

Create a new column y in the dataframe df with the following specs:
y = -1 if x2 < 1.4*x1
y = 1 if x2 > 1.4*x1