Tkinter 画布绘制风玫瑰图

Question

在 tkinter 窗口中绘制 Windrose 时遇到了一些问题。我无法让风玫瑰自行显示，窗口显示情节后面的另一个网格（见下图）。有什么方法可以让这个只显示windrose而没有背景中的额外网格？最终代码将每 x 秒更新一次，这就是情节动画的原因

from tkinter import *
from windrose import WindroseAxes
from matplotlib import pyplot as plt
import numpy as np
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import matplotlib.animation as animation
from matplotlib import style
import tkinter as tk


root = Tk()
style.use("ggplot")

fig = plt.figure(figsize=(6,4),dpi=100)
a = fig.add_subplot(111)

def animate(i):
    ws = np.random.random(500) * 6
    wd = np.random.random(500) * 360

    a.clear()
    rect = [0.1,0.1,0.8,0.8] 
    wa = WindroseAxes(fig, rect)
    fig.add_axes(wa)
    wa.bar(wd, ws, normed=True, opening=0.8, edgecolor='white')
    wa.set_legend()

canvas = FigureCanvasTkAgg(fig,root)
canvas.show()
canvas.get_tk_widget().pack(side=tk.BOTTOM,fill=tk.BOTH,
                     expand=True,anchor='s')

ani = animation.FuncAnimation(fig, animate, interval=1000)
root.mainloop()

Answer 1

您正在绘制两个相互重叠的图：

from tkinter import *
from windrose import WindroseAxes
from matplotlib import pyplot as plt
import numpy as np
import matplotlib
matplotlib.use("TkAgg")
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
import matplotlib.animation as animation
from matplotlib import style
import tkinter as tk


root = Tk()
style.use("ggplot")

fig = plt.figure(figsize=(6,4),dpi=100)
#a = fig.add_subplot(111) # this gives you the square grid in the background

def animate(i):
    ws = np.random.random(500) * 6
    wd = np.random.random(500) * 360

#    a.clear() # not needed if plot doesn't exist
    fig.clear() # we need to clear the figure you're actually plotting to
    rect = [0.1,0.1,0.8,0.8] 
    wa = WindroseAxes(fig, rect)
    fig.add_axes(wa)
    wa.bar(wd, ws, normed=True, opening=0.8, edgecolor='white')
    wa.set_legend()

canvas = FigureCanvasTkAgg(fig,root)
canvas.show()
canvas.get_tk_widget().pack(side=tk.BOTTOM,fill=tk.BOTH,
                     expand=True,anchor='s')

ani = animation.FuncAnimation(fig, animate, interval=1000)
root.mainloop()