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Bubble Charts

What is a bubble chart?

A bubble chart is a scatter plot where:

x axis = metric 1
y axis = metric 2
bubble size = metric 3 (volume)

Example

Bubble chart

import pandas as pd
import plotly.express as px
 
df = pd.DataFrame({
    "city": ["Pune", "Delhi", "Mumbai", "Bengaluru"],
    "sales": [120, 180, 90, 160],
    "profit": [30, 45, 10, 35],
    "orders": [200, 350, 120, 280],
})
 
fig = px.scatter(
    df,
    x="sales",
    y="profit",
    size="orders",
    color="city",
    hover_name="city",
    title="Sales vs Profit (bubble size = orders)",
)
fig.show()

Bubble chart

import pandas as pd
import plotly.express as px
 
df = pd.DataFrame({
    "city": ["Pune", "Delhi", "Mumbai", "Bengaluru"],
    "sales": [120, 180, 90, 160],
    "profit": [30, 45, 10, 35],
    "orders": [200, 350, 120, 280],
})
 
fig = px.scatter(
    df,
    x="sales",
    y="profit",
    size="orders",
    color="city",
    hover_name="city",
    title="Sales vs Profit (bubble size = orders)",
)
fig.show()

Tips

Keep sizes reasonable; very large bubbles hide others.
Use hover tooltips to reduce label clutter.

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