matplotlib example basic piechart (snippet)

Python matplotlib example 'basic piechart'

Functions in program:

def update(num,chocopie, a,b):
def update(num,chocopie, a,b):

Modules used in program:

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

python basic piechart

Python matplotlib example: basic piechart

%matplotlib inline
import matplotlib.pyplot as plt

# Pie chart, where the slices will be ordered and plotted counter-clockwise:
labels = 'Blackthunder', 'Tirolchoco', 'Mugichoco', 'Chocoflake'
sizes = [15, 30, 45, 10]
explode = (0, 0, 0.1, 0)  # only "explode" the 2nd slice (i.e. 'Mugichoco')

fig, ax = plt.subplots()
ax.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%',
        shadow=True, startangle=90)
#ax.axis('equal')  # Equal aspect ratio ensures that pie is drawn as a circle.
#fig.savefig("chocopie.png", dpi=150,transparent = False, bbox_inches = 'tight')
plt.show()


#rotate anim
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from IPython.display import HTML

labels = 'Blackthunder', 'Tirolchoco', 'Mugichoco', 'Chocoflake'
sizes = [15, 30, 45, 10]
explode = (0, 0, 0.1, 0)  # only "explode" the 2nd slice (i.e. 'Mugichoco')

def update(num,chocopie, a,b):
    if len(chocopie) > 0:
        ax.cla()

    chocopie,a,b, = ax.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%',
    shadow=True, startangle=4*num)

    ax.set_title("startangle = "+str(4 * num)[:4])

fig, ax = plt.subplots()    
chocopie,a,b, = ax.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%',shadow=True, startangle=0)
ani = animation.FuncAnimation(fig, update, frames=91,fargs=[chocopie, a,b], interval=100)
HTML(ani.to_html5_video())
#dpi=100
#ani.save('rotate_pie.mp4', writer="ffmpeg",dpi=dpi)


#explode anim

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
from IPython.display import HTML

labels = 'Blackthunder', 'Tirolchoco', 'Mugichoco', 'Chocoflake'
sizes = [15, 30, 45, 10]
explode = (0, 0, 0, 0)  
def update(num,chocopie, a,b):
    if len(chocopie) > 0:
        ax.cla()
    if num < 25:
        explode = (0, 0, 0.01*num, 0) 
        ax.set_title("explode = "+str(0.01*num)[:4])
    else:
        explode = (0, 0, -0.01*num+0.5, 0)
        ax.set_title("explode = "+str(-0.01*num+0.5)[:4])

    chocopie,a,b, = ax.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%',
                           shadow=True,startangle=90)

fig, ax = plt.subplots()    
chocopie,a,b, = ax.pie(sizes, explode=explode, labels=labels, autopct='%1.1f%%',shadow=True, startangle=0)
ani = animation.FuncAnimation(fig, update, frames=51,fargs=[chocopie, a,b], interval=100)
HTML(ani.to_html5_video())
#dpi=100
#ani.save('explode_pie.mp4', writer="ffmpeg",dpi=dpi)

Python links

Learn Python: https://pythonbasics.org/
Python Tutorial: https://pythonprogramminglanguage.com