How to use matplotlib-subplots

matplotlib_subplots.py

import ctypes
import tkinter
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk


if __name__ == "__main__":
    ctypes.windll.shcore.SetProcessDpiAwareness(1)
    root = tkinter.Tk()
    
    #graph data
    x = np.linspace(0, 2*np.pi, 400)
    y = np.sin(x**2)

    #create graph objects
    fig, ax = plt.subplots(ncols=2, nrows=2)
    ax[0, 0].plot(x,y)
    ax[1, 0].scatter(x,y)
    ax[0, 1].bar(x,y)
    ax[1, 1].fill(x,y)

    #set title
    fig.suptitle("fig object")
    ax[0, 0].set_title("ax[0, 0] plot")
    ax[1, 0].set_title("ax[1, 0] scater")
    ax[0, 1].set_title("ax[0, 1] bar")
    ax[1, 1].set_title("ax[1, 1] fill")
    plt.tight_layout()

    #set graph to tkinter window
    canvas = FigureCanvasTkAgg(fig, root)
    toolbar = NavigationToolbar2Tk(canvas, root)
    canvas.get_tk_widget().pack()           #show graph
    plt.close()

    root.mainloop()