有了这段代码,我想制作动态图形,我想让我的图形每60秒清晰一次,但我不能让它与cla()和clf()一起工作,出什么问题了? 除了使用cla()和clf()之外,还有其他方法可以清除graph吗?在
#import lib client paho mqtt
from Tkinter import *
from ttk import *
from datetime import datetime
import matplotlib
import paho.mqtt.client as mqtt
import redis, time
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
from matplotlib import style
import matplotlib.pyplot as plt
from matplotlib.pyplot import get_current_fig_manager
mqttc = mqtt.Client("serverclient",clean_session=False)#inisialisasi mqtt client
r = redis.Redis("localhost",6379)
start = time.time()
date = datetime.now().strftime('%S')
f = Figure(figsize=(5,4), dpi=100)
a = f.add_subplot(111)
b = f.add_subplot(111)
style.use('ggplot')
matplotlib.use("TkAgg")
suhu=30
cahaya=50
def mqttx():
#fungsi callback
def on_message(mqttc,obj,msg):
global LED1
global LED2
datasuhu = r.lrange("suhu",-1,-1)
datacahaya = r.lrange("cahaya",-1,-1)
print "Telah Diterima message : "+msg.payload+" topik "+msg.topic
r.rpush(msg.topic,msg.payload)
mqttc.on_message = on_message
mqttc.connect("localhost",1883)
mqttc.subscribe("suhu")
mqttc.subscribe("cahaya")
class Example(Frame):
def __init__(self, parent):
Frame.__init__(self, parent)
self.parent = parent
self.initUI()
self.graph()
def initUI(self):
self.parent.title("Subcriber")
self.style = Style()
self.style.theme_use("default")
self.pack(fill=BOTH, expand=1)
self.xList1 = []
self.yList1 = []
self.canvas = FigureCanvasTkAgg(f, self)
self.canvas.show()
self.canvas.get_tk_widget().pack(expand=True)
thismanager = get_current_fig_manager()
thismanager.window.wm_geometry("+500+0")
def graph(self):
suhu1 = r.lrange("suhu",-1,-1)
cahaya1 = r.lrange("cahaya",-1,-1)
date = datetime.now().strftime('%S')
join1=str(''.join(suhu1))
suhugraph=float(join1)
join2=str(''.join(cahaya1))
cahayagraph=float(join2)
self.xList1.append(date)
self.yList1.append(suhugraph)
a.clear()
a.axis([0, 100, 0, 60])
a.plot(self.xList1, self.yList1,"r-")
if date=="00" :
plt.clf()
plt.cla()
else:
self.canvas.draw()
self.after(1000, self.graph)
def main():
root = Tk()
root.geometry("1500x1400+300+300")
app = Example(root)
root.mainloop()
if __name__ == '__main__':
mqttx()
mqttc.loop_start()
main()
要清除图形,必须从
self.xList1
和self.yList1
中删除数据因为在清除plot(
a.clear()
/plt.clf()
/plt.cla()
)之后,列表中仍然有数据,您可以再次绘制它们。在我不能用
^{pr2}$Redis
和mqtt
来运行你的代码,所以我用random
制作了版本顺便说一句:matplotlib: clearing a plot, when to use cla(), clf() or close()?
至于调整大小后的响应-问题可能是代码中的两个循环:
root.mainloop()
和可能的mqttc.loop_start()
。我不能用mqttc
运行代码,所以我不能测试它。在顺便说一句:更新没有
plot()
和clear()
的绘图首先创建空行
然后你替换所有的数据
所以您不需要
clear()
并再次设置轴。在相关问题 更多 >
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