wxpython, updating plot (wx.lib.plot)

[dazzler]

Hi! I just moved using wxpython so I'm a quite newbie.

I was wondering how to update plotcanvas?
In my code I made button with event to update plotcanvas with new results, but how to properly do it? because now when I press button it makes new "layer" into my GUI and doesn't delete the old plot. Should I first delete the old one and then create new plot, or just update old one, well either way I don't know how to do it... =/

#!/usr/bin/env python
# -*- coding: UTF-8 -*-
 
import wx
import wx.lib.plot as plot
 
class MyFrame(wx.Frame):
    def __init__(self):
        self.frame1 = wx.Frame(None, title="test", id=-1, size=(500, 300))
        self.panel1 = wx.Panel(self.frame1)
        self.panel1.SetBackgroundColour("white")
 
        Button1 = wx.Button(self.panel1, -1, "Update", (200,220))
        Button1.Bind(wx.EVT_BUTTON, self.redraw)
 
        plotter = plot.PlotCanvas(self.panel1)
        plotter.SetInitialSize(size=(500, 200))
 
        data = [[1, 10], [2, 5], [3, 10], [4, 5]]
        line = plot.PolyLine(data, colour='red', width=1)
 
        gc = plot.PlotGraphics([line], 'Test', 'x', 'y')
        plotter.Draw(gc)
 
        self.frame1.Show(True)
 
 
    def redraw(self, event):
        plotter = plot.PlotCanvas(self.panel1)
        plotter.SetInitialSize(size=(500, 200))
 
        data2 = [[1, 20], [2, 15], [3, 20], [4, -10]]
        line = plot.PolyLine(data2, colour='red', width=1)
 
        gc = plot.PlotGraphics([line], 'Test', 'x', 'y')
        plotter.Draw(gc)
 
app = wx.PySimpleApp()
f = MyFrame()
app.MainLoop()
 

[jlm699]

plotter.Clear() should take care of clearing the canvas.

I've only used matplotlib before; and I know that in order to get a dynamic plot up and running I had to use clear before every new plot. I assume it would be similar with wx.lib.plot