I am trying to animate a live graph in a wx.Panel. I would like to have the x-axis update like this example. Many of the examples I see are basic and don't take into consideration other controls and functions in the class. Others have so many extras that I get lost in the weeds. I can't get the animation command in the right place or update the x-axis. Here is the code:
import wx
import logging
import numpy as np
import matplotlib
import time
import matplotlib.animation as animation
matplotlib.use('WXAgg')
import matplotlib.pyplot as plt
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.backends.backend_wx import NavigationToolbar2Wx
from matplotlib.figure import Figure
fTemp = ""
x = 0
class TempClass(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, -1, title="", size=(600,500))
panel = wx.Panel(self)
self.fig = Figure(figsize=(6,4), dpi=75, facecolor='lightskyblue', edgecolor='r')
self.canvas = FigureCanvas(self, -1, self.fig)
self.ax = self.fig.add_subplot(111)
self.ax2 = self.ax.twinx()
self.ax.set_ylim(60,90)
self.ax.set_xlim(0,24)
self.ax2.set_ylim(0,100)
# major ticks every 5, minor ticks every 1
xmajor_ticks = np.arange(0, 24, 5)
xminor_ticks = np.arange(0, 24, 1)
self.ax.set_xticks(xmajor_ticks)
self.ax.set_xticks(xminor_ticks, minor=True)
self.ax.grid()
self.ax.set_xlabel('Hour')
self.ax.set_ylabel('Temp')
self.ax2.set_ylabel('Humidity')
self.ax.set_title('Temperature')
# The graph does not show in the panel when this in uncommented
#self.ani = animation.FuncAnimation(self.fig, self.onPlotTemp, interval=1000)
self.fanSensorTimer = wx.Timer(self)
self.Bind(wx.EVT_TIMER, self.onPlotTemp, self.fanSensorTimer)
self.fanSensorBtn = wx.Button(self, -1, "Start Sensor")
self.Bind(wx.EVT_BUTTON, self.onStartTempPlot, self.fanSensorBtn)
font1 = wx.Font(18, wx.DEFAULT,wx.NORMAL,wx.BOLD)
self.displayTemp = wx.StaticText(self, -1, "Current Tempurature")
self.curTempTxt = wx.TextCtrl(self, -1, "0",size=(100,40), style=wx.TE_READONLY|wx.TE_CENTRE|wx.BORDER_NONE)
self.curTempTxt.SetFont(font1)
self.displayHum = wx.StaticText(self, -1, "Current Humidity")
self.curHumTxt = wx.TextCtrl(self, -1,"0", size=(100,40), style=wx.TE_READONLY|wx.TE_CENTRE|wx.BORDER_NONE)
self.curHumTxt.SetFont(font1)
self.displayBox = wx.GridBagSizer(hgap=5,vgap=5)
self.displayBox.Add(self.displayTemp, pos=(0,0), flag=wx.TOP|wx.LEFT, border=5)
self.displayBox.Add(self.displayHum, pos=(0,1), flag=wx.TOP, border=5)
self.displayBox.Add(self.curTempTxt, pos=(1,0), flag=wx.ALL, border=5)
self.displayBox.Add(self.curHumTxt, pos=(1,1), flag=wx.ALL, border=5)
#---------
self.vbox = wx.BoxSizer(wx.VERTICAL)
self.vbox.Add(self.canvas, wx.ALIGN_CENTER|wx.ALL, 1)
self.vbox.Add(self.fanSensorBtn)
self.vbox.Add(self.displayBox, wx.ALIGN_CENTER|wx.ALL, 1)
self.SetSizer(self.vbox)
self.vbox.Fit(self)
def start(self):
# get temp/humidity reading from node
pass
def readTemp(self, data1, data2):
"Populates Current Temp"
global fTemp
self.curTempTxt.Clear()
a = format(data1, '08b')
b = format(data2, '08b')
x = a+b
y = int(x, base=2)
cTemp = ((175.72 * y)/65536)-46.85
fTemp = cTemp *1.8+32
cel = format(cTemp,'.1f')
far = format(fTemp,'.1f')
self.curTempTxt.WriteText(far + (u'\u00b0')+"F")
def rh1(self, data1, data2):
"Populates Current RH"
global relhum
self.curHumTxt.Clear()
a = format(data1, '08b')
b = format(data2, '08b')
x = a+b
y = int(x, base=2)
rh = ((125 * y)/65536)-6
relhum = format(rh,'.1f')
self.curHumTxt.WriteText(relhum + " %")
def onStartTempPlot(self,event):
#set for a short time period for testing purposes
self.fanSensorTimer.Start(5000)
print "Timer Started"
def onPlotTemp(self,event):
global fTemp, x, relhum
x +=1
y = int(fTemp)
y2 = float(relhum)
self.ax.plot(x,y,'r.')
self.ax2.plot(x,y2,'k.')
self.fig.canvas.draw()
# send message to node for another reading of temp/humidity
if __name__ == "__main__":
app = wx.App(False)
frame = TempClass()
frame.Show()
frame.start()
logging.basicConfig(level=logging.DEBUG)
app.MainLoop()
I would like to see the x axis increment as the data is plotted beyond the 24 hour point on the graph; when data for point 25 appears, the first point is dropped and the x axis shows '25'. The animation is commented out because it causes the graph to disappear until a point is plotted.
Here is a runnable example of what I am trying to achieve with the x axis:
import numpy
from matplotlib.pylab import *
from mpl_toolkits.axes_grid1 import host_subplot
import matplotlib.animation as animation
# Sent for figure
font = {'size' : 9}
matplotlib.rc('font', **font)
# Setup figure and subplots
f0 = figure(num = 0, figsize = (6, 4))#, dpi = 100)
f0.suptitle("Oscillation decay", fontsize=12)
ax01 = subplot2grid((2, 2), (0, 0))
# Set titles of subplots
ax01.set_title('Position vs Time')
# set y-limits
ax01.set_ylim(0,2)
# sex x-limits
ax01.set_xlim(0,1)
# Turn on grids
ax01.grid(True)
# set label names
ax01.set_xlabel("x")
ax01.set_ylabel("py")
# Data Placeholders
yp1=zeros(0)
yv1=zeros(0)
yp2=zeros(0)
yv2=zeros(0)
t=zeros(0)
# set plots
p011, = ax01.plot(t,yp1,'b-', label="yp1")
p012, = ax01.plot(t,yp2,'g-', label="yp2")
# set lagends
ax01.legend([p011,p012], [p011.get_label(),p012.get_label()])
# Data Update
xmin = 0
xmax = 24
x = 0
def updateData(self):
global x
global yp1
global yv1
global yp2
global yv2
global t
tmpp1 = 1 + exp(-x) *sin(2 * pi * x)
tmpv1 = - exp(-x) * sin(2 * pi * x) + exp(-x) * cos(2 * pi * x) * 2 * pi
yp1=append(yp1,tmpp1)
yv1=append(yv1,tmpv1)
yp2=append(yp2,0.5*tmpp1)
yv2=append(yv2,0.5*tmpv1)
t=append(t,x)
x += 1
p011.set_data(t,yp1)
p012.set_data(t,yp2)
if x >= xmax-1:
p011.axes.set_xlim(x-xmax+1,x+1)
return p011
# interval: draw new frame every 'interval' ms
# frames: number of frames to draw
simulation = animation.FuncAnimation(f0, updateData, blit=False, frames=200, interval=20, repeat=False)
plt.show()
self.ax = self.figure.add_subplot(111)from the tempPlot function, otherwise you recreate self.ax in every iteration of the animation.