Matplotlib 3.0 Cookbook

How to do it...

The following are the steps required to implement the logic:

1. Prepare the data for the polar plot:

theta = np.arange(0., 2., 1./180.)*np.pi

2. Define and instantiate the figure:

fig = plt.figure(figsize=(6, 5), dpi=100)

3. Define and instantiate the axes on the figure:

ax = fig.add_subplot(111,projection='polar')

4. Plot the polar graph:

ax.plot(theta, 5*np.cos(3*theta))

5. Define the window into which the Tkinter widgets will be placed:

window = fig.canvas.manager.window

6. Define the callback function for the Slider widget:

def update():    n=n_slider.get()    ax.clear()    ax.plot(theta, 5*np.cos(n*theta))    fig.canvas.draw()

7. Define and instantiate the slider:

n_slider = tk.Scale(master=window,variable=tk.IntVar(), from_=3,  to=10, ...