How to add line based on slope and intercept in Matplotlib?

Question

In R, there is a function called abline in which a line can be drawn on a plot based on the specification of the intercept (first argument) and the slope (second argument). For instance,

plot(1:10, 1:10) abline(0, 1) 

where the line with an intercept of 0 and the slope of 1 spans the entire range of the plot. Is there such a function in Matplotlib?

Answer 1

A lot of these solutions are focusing on adding a line to the plot that fits the data. Here's a simple solution for adding an arbitrary line to the plot based on a slope and intercept.

import matplotlib.pyplot as plt  import numpy as np      def abline(slope, intercept):     """Plot a line from slope and intercept"""     axes = plt.gca()     x_vals = np.array(axes.get_xlim())     y_vals = intercept + slope * x_vals     plt.plot(x_vals, y_vals, '--')