Questions on python3 pandas
Write a program that uses pandas to plot a regression line, that is, the line with the best fit through a collection of points. First, ask the user to specify the data points by clicking on them in a graphics window. To find the end of input, place a small rectangle labeled “Draw” in the lower left corner of the window; the program will stop gathering points when the user clicks inside the rectangle.
Draw all points on the graphics window.
Collect the points in a dictionary; convert the dictionary to a DataFrame, and use pandas to perform computation without using loops.
use pandas “sum” function; do not use pandas function for average.
If the user enters no point or one point, program prints a message “You need at least two points for a regression line” and terminates.