Assignment 1
Generate a least square fit line for l v/s t^2 using the data in the file 'pendulum.txt'. 

Assignment 2
What does ones_like([1, 2, 3]) produce
        array([1, 1, 1])
        [1, 1, 1]
        [1.0, 1.0, 1.0]
        Error
The plot of u vs v is a bunch of scattered points that show a linear trend. How do you find the least square fit line of u vs v.