CODEWITHSUNDEEP
pythoncanvasmatplotlibtkinter
alessandro
alessandro

Reputation: 3984

two matplotlib figures in two different tk canvas

I tried to adapt Hans' answer in Matplotlib plot in Tkinter - every update adds new NavigationToolbar? to have 2 different plots in 2 different canvas.

I have a problem: I don't know how to refer to the two different figures.

Although fig1 is in canvas1 and fig2 in canvas2, the plt.plot function doesnt refer to them - and plt.figure() doesnt help. How can I plot one thing in a canvas and a different thing in the other one?

from Tkinter import Tk, Button
import numpy as np
import random
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg

def plotthem():
    plt.figure(1)
    plt.clf()
    x = np.arange(0.0,3.0,0.01)
    y = np.sin(2*np.pi*x+random.random())
    plt.plot(x,y)
    plt.gcf().canvas.draw()

    plt.figure(2)
    plt.clf()
    x = np.arange(0.0,3.0,0.01)
    y = np.tan(2*np.pi*x+random.random())
    plt.plot(x,y)
    plt.gcf().canvas.draw()

root = Tk()

b = Button(root, text="Plot", command = plotthem)
b.grid(row=0, column=0)

# init figures
fig1 = plt.figure()

canvas1 = FigureCanvasTkAgg(fig1, master=root)
toolbar = NavigationToolbar2TkAgg(canvas1, root)
canvas1.get_tk_widget().grid(row=0,column=1)
toolbar.grid(row=1,column=1)

fig2 = plt.figure()
canvas2 = FigureCanvasTkAgg(fig2, master=root)
toolbar = NavigationToolbar2TkAgg(canvas2, root)
canvas2.get_tk_widget().grid(row=0,column=2)
toolbar.grid(row=1,column=2)


root.mainloop()

Upvotes: 2

Views: 3674

Answers (1)

alessandro
alessandro

Reputation: 3984

ok, I figured it out... You just have to use plt.gcf().canvas.draw() each time, since gcf() stands for get current figure, and working in tandem with plt.figure() it is able to update different figures in different canvas.

Upvotes: 1

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