Here is the explanation for the preceding code:
- The first four steps are already familiar to you.
- window = fig.canvas.manager.window gets access to Tkinter's application through its window.
- def update(): is the callback function for the tk.Scale widget:
- n=n_slider.get() gets the current value of the slider, when the mouse was dragged and released, which in this case is 7.
- ax.clear() erases the previous plot on the axes.
- ax.plot(theta, 5*np.cos(n*theta)) plots the new graph with a current value of n.
- fig.canvas.draw() refreshes the figure.
- n_slider = tk.Scale() defines the slider widget with the following arguments:
- master=window specifies that the slider widget should be created as a child of the main window.
- variable=tk.IntVar() ...
