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plotly export chart animation

Chris P. answered on October 24, 2022 Popularity 3/10 Helpfulness 4/10

answer plotly export chart animation

plotly export chart animation

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import numpy as np
from scipy.spatial import Delaunay
import plotly.graph_objects as go
import  moviepy.editor as mpy
import io 
from PIL import Image

def plotly_fig2array(fig):
    #convert Plotly fig to  an array
    fig_bytes = fig.to_image(format="png")
    buf = io.BytesIO(fig_bytes)
    img = Image.open(buf)
    return np.asarray(img)

n = 20 # number of radii
h = 2/(n-1)
r = np.linspace(h, 2,  n)
theta = np.linspace(0, 2*np.pi, 60)
r, theta = np.meshgrid(r,theta)
r = r.flatten()
theta = theta.flatten()

x = r*np.cos(theta)
y = r*np.sin(theta)

# Triangulate the circular  planar region
tri = Delaunay(np.vstack([x,y]).T)
faces = np.asarray(tri.simplices)
I, J, K = faces.T

f = lambda h: np.sinc(x**2+y**2)+np.sin(x+h)   

fig = go.Figure(go.Mesh3d(x=x,
                     y=y,
                     z=f(0),
                     intensity=f(0),
                     i=I,
                     j=J,
                     k=K,
                     colorscale='matter_r', 
                     showscale=False))
                     
fig.update_layout(title_text='My hat is flying with MoviePy',
                  title_x=0.5,
                  width=500, height=500, 
                  scene_xaxis_visible=False, 
                  scene_yaxis_visible=False, 
                  scene_zaxis_visible=False)

# No Plotly frames are defined here!! Instead we define moviepy frames by
# converting each Plotly figure to  an array, from which MoviePy creates a clip
# The concatenated clips are saved as a gif file:
def make_frame(t):
    z = f(2*np.pi*t/2)
    fig.update_traces(z=z, intensity=z)  #These are the updates that usually are performed within Plotly go.Frame definition
    return plotly_fig2array(fig)

animation = mpy.VideoClip(make_frame, duration=2)
animation.write_gif("image/my_hat.gif", fps=20)

Popularity 3/10 Helpfulness 4/10 Language whatever

Source: community.plotly.com

Tags: animation export plotly whatever

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Contributed on Oct 24 2022

Chris P.

0 Answers Avg Quality 2/10

plotly export chart animation

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