How to animate a 2D numpy array using matplotlib?

Question

I'm trying to animate a numpy array using matplotlib:

import numpy as np

import matplotlib.pyplot as plt
import matplotlib.animation as animation

arr = []
for i in range(100):
    c = np.random.rand(10, 10)        
    arr.append(c)

plt.imshow(arr[45])

I don't get it how I should animate an array like this: https://matplotlib.org/examples/animation/dynamic_image.html

The answer is in the example you posted - you need to use FuncAnimation provided with a callback function to update the plot you made. — jadelord
– jadelord, Commented May 18, 2018 at 15:12
You need to define a figure (fig in the example), so FuncAnimation() knows, what to update. Then you need an update function that tells matplotlib, what to do with the figure. Is it a jump to the left and then a step to the right? We don't know, but the script should. — Mr. T
– Mr. T, Commented May 18, 2018 at 15:37

user213544 · Accepted Answer · 2019-07-11 14:16:32Z

5

Oh thanks, it was easyer then I expected.

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

fig = plt.figure()
i=0
im = plt.imshow(arr[0], animated=True)
def updatefig(*args):
    global i
    if (i<99):
        i += 1
    else:
        i=0
    im.set_array(arr[i])
    return im,
ani = animation.FuncAnimation(fig, updatefig,  blit=True)
plt.show()

edited Jul 11, 2019 at 14:16

user213544

2,1464 gold badges36 silver badges62 bronze badges

answered May 18, 2018 at 17:58

pats

1431 gold badge1 silver badge8 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to animate a 2D numpy array using matplotlib?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related