从TCP数据使用Matplotlib进行绘图

Question

I am trying trying to plot something with python. I have incoming data that update a float variable each iteration. I would like to plot it with matplotlib with respect to time. This is where I am stuck!

import socket
import sys

socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.bind(('', 5027))
socket.listen(5)
client, address = socket.accept()
print("{} connected".format( address ))
while True:
    response = client.recv(512)   
    print(response)
print ("close")
client.close()
stock.close()

response is the string variable.

import matplotlib.pyplot as plt
import numpy as np
import math

body = '+1.33E+00@-6.54E+00@1.00E+00@-6.53E+00@'
one, two, three, four, five = body.split("@")
signal_1 = float(one)
signal_2 = float(two)
signal_3 = float(three)
signal_4 = float(four)
# Plot
t = 5
plt.plot(t, signal_1,t, signal_2,t, signal_3,t, signal_4,)
plt.show()

body is the simulated signal of the response variable in the first code. I want to plot the value of signal_1 with respect to time. Kindly assist me!

Answer 1

Each series to plot has only one data point, eg the first one would be (5,1.33) .
The plt.plot command is a line plot. However, a line which connects a single point with itself remains invisible.

A possible solution is to set a marker ( marker="o" ) to show at the respective coordinates.

plt.plot(t, signal_1,t, signal_2,t, signal_3,t, signal_4, marker="o")

Of course you could also choose different markers for the respecive points,

plt.plot(t, signal_1, "ko", t, signal_2, "bs", t, signal_3, "rd", t, signal_4, "y^")