我使用的是每次打开图形窗口都会触发的函数plot_graph()
,我的问题是:如何每次在同一位置使用此函数绘制图形?
plot_graph函数如下所示:
def plot_graph(self,event):
df_1 = self.controller.df_1
df_2 = self.controller.df_2
df_3 = self.controller.df_3
df_4 = self.controller.df_4
f = Figure(figsize=(5, 5), dpi=100)
a = f.add_subplot(111)
a.plot(df_1['mean'])
a.plot(df_2['mean'])
a.plot(df_3['mean'])
a.plot(df_4['mean'])
a.legend(['bsl morning', '1st expo', 'bsl noon', '2nd expo'])
canvas = FigureCanvasTkAgg(f, self)
canvas.draw()
canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
并使用self.bind("<<ShowGraph>>", self.plot_graph)
调用此函数。
在第二次调用此函数后,程序开始在第一个下创建第二个图形,打开并打开。Output of program,正如你在图像中看到的,我想要防止这种情况,并且只有一个图。感谢您的帮助!
发布于 2019-06-19 05:19:57
我相信你有两个选择:
下面演示了选项#2:
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
import tkinter
import numpy as np
class MyClass:
def __init__(self, frame):
self.frame = frame
self.fig = Figure(figsize=(5, 5), dpi=100)
self.ax = self.fig.add_subplot(111)
self.canvas = FigureCanvasTkAgg(self.fig, self.frame)
self.canvas.draw()
self.canvas.get_tk_widget().pack(side=tkinter.TOP, fill=tkinter.BOTH, expand=True)
self.button = tkinter.Button(self.frame, text="plot", command=self.plot_graph)
self.button.pack()
def plot_graph(self):
x, y = np.random.random(size=(2, 10))
self.ax.cla()
self.ax.plot(x, y)
self.canvas.draw()
root = tkinter.Tk()
MyFrame = tkinter.Frame(root)
MyClass(MyFrame)
MyFrame.pack()
root.mainloop()
https://stackoverflow.com/questions/56655732
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