Plotly: Change order of elements in Sunburst Chart

Question

I am currently using plotly express to create a Sunburst Chart. However, i realized that children are ordered alphabetical for nominal values. Especially for plotting months that is pretty unlucky… Do you know how to handle that issue? Maybe a property or some workaround? Below there is an example so you can try it yourself. Thanks in advance!

import plotly.express as px
import pandas as pd
import calendar
months = [x for x in calendar.month_name if x]

#Create Dataframe
data = []
for m in months:
    data.append(['2018', m, 2])
df = pd.DataFrame(data, columns=['Year', 'Month', 'Value'])

#Compute Sunburst
fig = px.sunburst(df, path=['Year', 'Month'], values='Value')
fig.show()

Asked By: LK1999

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Source

Answer 1

Please Check this out. I have just added values to each months instead of hardcoding 2. So the corresponding month matches with corresponding number.

January-1, February-2, … December-12

import plotly.express as px
import pandas as pd
import calendar
months = [x for x in calendar.month_name if x]
#Create Dataframe
data = []
for i,m in enumerate(months):
    data.append(['2018', m,i+1])
print(data)
df = pd.DataFrame(data, columns=['Year', 'Month', 'Value'])

#Compute Sunburst
fig = px.sunburst(df, path=['Year', 'Month'], values='Value')
fig.show()

Answered By: Karthik

Answer 2

The other solution gives each month an angle proportional to its number. A small tweak to line 8 as follows:

data.append(['2018', m,0.00001*i+1])

gives each month the same sized piece of the pie.

A better solution is to disable the auto-sorting of the elements:

fig.update_traces(sort=False, selector=dict(type='sunburst'))

which then adds the elements in the order that they are defined in the data.

Answered By: Chuck

Plotly: Change order of elements in Sunburst Chart

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