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 Making a Matplotlib in Tkinter using a slider Jemeronimo Programmer named Tim Posts: 7 Threads: 6 Joined: Oct 2018 Reputation: 0 Likes received: 0 #1 Dec-03-2018, 01:37 PM (This post was last modified: Dec-03-2018, 01:38 PM by Jemeronimo. Edited 2 times in total.) Hello, I'm trying to get 2 plots that react on a Slider using Tkinter. Mostly I want it to be a function of: y=(Slider Value) * sin(x) And on the right another function y= x * sin(Slider Value) Below is what I have so far, sorry if it is not neatly programmed. If I slide my Slider I would like it to overwrite the previous graph. Hopefully someone can help me! ```import numpy as np import math as math import matplotlib import tkinter as Tk import matplotlib.pyplot as plt from matplotlib.widgets import Slider from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg matplotlib.use('TkAgg') root = Tk.Tk() root.wm_title("Embedding in TK") fig = plt.Figure() canvas = FigureCanvasTkAgg(fig, root) canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1) ax1 = fig.add_subplot(121) ax2 = fig.add_subplot(122) fig.subplots_adjust(bottom=0.25) def create_values(): return x_values, y_values x_values = np.arange(-20,20,0.1) y_values=[] for i in range(0, len(x_values)): y_values.append(math.sin(x_values[i])) ax1.axis([(-math.pi-1), (math.pi+1), -10, 10]) ax1.plot(x_values, y_values) ax1_value = fig.add_axes([0.12, 0.1, 0.78, 0.03]) s_time = Slider(ax1_value, 'Value', 0, 30, valinit=0) def update(val): pos = s_time.val ax1.plot(x_values+pos,y_values) fig.canvas.draw_idle() s_time.on_changed(update) Tk.mainloop()``` Gribouillis Posts: 2,267 Threads: 25 Joined: Jan 2018 Reputation: 215 Likes received: 548 #2 Dec-05-2018, 08:06 AM You can try something like this ```(l,) = ax1.plot(x_values, y_values) (r,) = ax2.plot(x_values, y_values) def update(val): pos = s_time.val l.set_ydata(pos * np.sin(l.get_xdata())) x = r.get_xdata() r.set_ydata(x * np.sin(pos * x)) fig.canvas.draw_idle() ``` Jemeronimo likes this post « Next Oldest | Next Newest »

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