Numpy Matplotlib-绘图不会显示
我想在按下按钮时绘制函数图(使用matplotlib),为此我编写了以下代码:Numpy Matplotlib-绘图不会显示,numpy,matplotlib,python-3.4,sympy,Numpy,Matplotlib,Python 3.4,Sympy,我想在按下按钮时绘制函数图(使用matplotlib),为此我编写了以下代码: ##--IMPORT #Tkinter from tkinter import Tk, ttk from tkinter import Frame, LabelFrame, Button from tkinter import FALSE #Numpy from numpy import linspace #Sympy from sympy import symbols,sympify,diff,N,log #Mat
##--IMPORT
#Tkinter
from tkinter import Tk, ttk
from tkinter import Frame, LabelFrame, Button
from tkinter import FALSE
#Numpy
from numpy import linspace
#Sympy
from sympy import symbols,sympify,diff,N,log
#MathPlotLib
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
_x = symbols("x")
_sympyFunction = None
_SP_mainSubPlot = None
def pr_draw(plotToDrawTo):
_sympyFunction = sympify("log(x) + x")
valuesRange = linspace(0.01, 3, 100)
x = []
y = []
#Calculate y and x values
for i in range(0, len(valuesRange)):
tempValue = N(_sympyFunction.subs(_x,valuesRange[i]))
x.append(float(valuesRange[i]))
y.append(float(tempValue))
#Draw function graph
plotToDrawTo.plot(x,y)
##--MAIN
if __name__== "__main__":
_root = Tk()
_root.title("Grafico Approsimativo")
_root.resizable(width = FALSE, height = FALSE)
_mainFrame = Frame(_root, bg = "black")
_mainFrame.pack(fill = "both", expand = True)
#Frames
#Main Left
_F_LeftMainFrame = Frame(_mainFrame)
_F_LeftMainFrame.grid(row = 0, column = 0, sticky = "nw")
_F_RightMainFrame = Frame(_mainFrame, bg = "violet")
_F_RightMainFrame.grid(row = 0, column = 2, sticky = "ne")
#Left Content--------------------------
_B_calculate = Button(_F_LeftMainFrame, text = "Draw", command = lambda: pr_draw(_SP_mainSubPlot))
_B_calculate.grid(row = 0, column = 0, padx = 5, pady = 5, sticky = "w")
#Right Content--------------------------
_F_mainPlotWindow = Figure(figsize = None, dpi = 100)
_SP_mainSubPlot = _F_mainPlotWindow.add_subplot(111)
_SP_mainSubPlot.grid(True)
#HERE
#Set master frame for Figure Obj
canvas = FigureCanvasTkAgg(_F_mainPlotWindow, master = _F_RightMainFrame)
canvas.get_tk_widget().pack()
这里的问题是,当按下按钮时,绘图窗口中没有显示任何内容,我唯一能让它工作的方法是调用pr#u draw(_SP_main subplot),我在其中插入了#here行:如果在那里调用函数,它将工作,但不会从按钮开始。,为什么?在绘制画布后,需要重新绘制画布 添加行
plotToDrawTo.figure.canvas.draw_idle()
在pr_draw
函数结束时,应该这样做
请注意,我还必须在脚本末尾添加
\u root.mainloop()
,以实际显示窗口。非常感谢!对于_root.mainloop(),我只是忘了在问题中复制它。