Hi,
--- On Tue, Sep 29, 2015 at 11:59 PM, Benjamin Root
<[email protected]> wrote:
| You have some logic issues here. First off, I wouldn't be updating the plot
| in the same function that is updating the data values. Assuming that
| "loop_start()" is asynchronous, the update frequency for it is likely to be
| entirely different from the Animation update frequency. So, just have that
| function do updates.
\--
Okay.
---
| You should also declare x, y, and z as globals in that
| function so that the reassignment of those arrays persist properly.
\--
Done.
---
| Your list comprehension prior to concatenating uses a variable "x", which is
| likely causing the current error that you see. Change that name to something
| else.
\--
Done.
---
| Lastly, I implore you to use "set_data()" like in the original example,
| rather than calling plot() repeatedly.
\--
This is how the code looks like now:
=== BEGIN ===
import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import sys
import paho.mqtt.client as mqtt
import itertools
def update_line(num, dataLines, lines):
for line, data in zip(itertools.repeat(lines, len(dataLines)), dataLines):
line.set_data(data[0:2, :num]) #
IndexError too many indices
line.set_3d_properties(data[2, :num])
return lines
def on_connect(client, userdata, flags, rc):
print("Connected with result code "+str(rc))
client.subscribe("hello/world")
def on_message(client, userdata, msg):
global x, y, z
data = msg.payload
print(msg.topic+" "+str(msg.payload))
point = np.asarray([float(element) for element in data.split()])
print point
x=np.concatenate((x,[point[0]]))
y=np.concatenate((y,[point[1]]))
z=np.concatenate((z,[point[2]]))
fig = plt.figure()
ax = fig.gca(projection='3d')
ax.set_xlabel('X')
ax.set_ylabel('Y')
ax.set_zlabel('Z')
x = np.array([1.0, 2.0, 3.0])
y = np.array([4.0, 7.0, 8.0])
z = np.array([6.0, 9.0, 5.0])
data = [x, y, z]
lines, = ax.plot(x, y, z, label='Line')
ax.legend()
client = mqtt.Client()
client.on_connect = on_connect
client.on_message = on_message
client.connect_async("localhost", 1883, 60)
client.loop_start()
line_ani = animation.FuncAnimation(fig, update_line, 25, fargs=(data,
lines), interval=2000, blit=True)
plt.show()
=== END ===
So, the error now is in line.set_data where it says there are too many
indices. If I remove :num, in both line.set_data and
line.set_3d_properties, it tells me that 'TypeError': 'Line3D' is not
iterable.
Thanks for patiently answering my queries.
SK
--
Shakthi Kannan
http://www.shakthimaan.com
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