Animations With matplotlib

[rizkimardian]

I think you forgot mentioning about installing the necessary moviewriter (ffmpeg)

[mohd.farhanhassan]

I am getting an error on the line

video = anim.to_html5_video()

Can we do it without converting it to HTML5, like a normal plot, I don't need to save it, I just need to run it and display

[kainpmn]

Amazing tutorial btw a lot of other tutorials just write code and expect you to understand but you actually explain!

[kainpmn]

I just wish someone would tell me how to make a animation of a straight line growing not a sine.

[julians.]

very clear and concise, much better than other tutorials on the subject°

[mapanjiwicaksono]

Thanks for the brief tutorial. Hope you live a good life :)

[BaibhavSrivastaw]

Hey! Thanks a lot for the amazing video. Can you please make a video on how to do this for 3d plots in matplotlib? It would really be helpful

[bennguyen]

I'd like for one process to receive data from the serial port, and then push that data into a queue so that matplotlib can update the figure real-time!

However, FuncAnimation is not automatically calling the update function I've specified.
animation.FuncAnimation(plt.gcf(), func=self.animate_fig(), interval=100, blit=True, repeat=True)

The figure opens, but do you see anything that is preventing the call to "animate_fig"? I don't see the periodic "Update" print statement!


from time import time, sleep
from multiprocessing import Queue as mpQueue
import matplotlib.pyplot as plt
import matplotlib.animation as animation

global ani #### Must be assigned to a global variable

class PlotClass:
# Create STATIC LOCAL instances accessible across class functions
fig = None
ax = None
line1 = None
q = None
x_list_vec = []
y1_list_vec = []

def __init__(self, qdata ):
# Save handle to Queue
self.q = qdata

# this is the call to matplotlib that allows dynamic plotting
plt.ion()

# Setup Figure with 'size' number of elements
self.fig = plt.figure(figsize=(13, 6))
self.ax = self.fig.add_subplot(111)

# Create a list variable to the animation
self.line1, = self.ax.plot(self.x_list_vec, self.y1_list_vec, marker = 'o', label='y1', color='r')

# show a starting plot
plt.xticks(rotation=45, ha='right')
plt.title('Title: Hello World')

plt.show()

def animate_fig(self, frame_num, user_arg1, user_arg2): #<<<< Never Executes after FuncAnimation!!!
print("Update") ### <--- Does not show in console!
newdata = 0
while self.q.empty() is False:
print ("Got Data!")
newdata = self.q.get()
print ( newdata )

### update figure with the last data received
self.line1.set_data(0, newdata)

### must return list when blit=True
return self.line1,

# Override the run function of Thread class
def run(self):

# Must be assigned to a global variable!
global ani
ani = animation.FuncAnimation(fig=self.fig, func=self.animate_fig, fargs=["Hi", 2], interval=100, blit=True, repeat=True)
print ("FuncAnimation started")


if __name__=='__main__':
try:
# Shared Memory
q = mpQueue()

# Start Plotter
mpInst = PlotClass( q )
mpInst.run()

# Push Data to Plotter
i = 0
while True:
q.put(i) ### <--- Data to appear in Figure
sleep(1)
i = i+1
print(".")

except KeyboardInterrupt:
print ("Keyboard Interrupt!")

[mnicp]

by far best, clear and fast tutorial I have seen this handled with on YouTube... thank you

[jagmeetsond]

my code not displaying in Jupyter Notebooks

[HenningPhysics]

Man! Great content! Thanks for the time invest in sharing knowledge with us!

[berkoukes-design]

Verry good video, i looked everywhere for a video explainig how to do animations on matplotlib but i didn't find any, you saved me

[johnxisde]

Thanks for that explanation, man! You're amazing

[trishnachakraborty]

hey u mentioned that thr r several other fns tht helps to plot the animated grapgh other then funcanimation could u please name some coz funcanimation attribute is not responding in my system

[wenhanzhou]

Finally found a tutorial that works! Thanks a lot!

[alexcros]

Post relevant code in description or link to it so that we dont have to copy it manualy.

Thanks, great job man, will follow.

[michaelk]

Thanks for the nice tutorial!
One issue though: I tried the code and got an error message:
RuntimeError: The animation function must return a sequence of Artist objects.
I had to add "return line, " to the end of the animate(frame) function - then it works.
Why does this not produce an error in your code?.