"""
Table Bubble Plot (Github Punch Card)
-------------------------------------
This example shows github contributions by the day of week and hour of the day.
"""
# category: scatter plots
import altair as alt
from vega_datasets import data

source = data.github()

(
    alt.Chart(source)
    .mark_circle()
    .encode(x="hours(time):O", y="day(time):O", size="sum(count):Q")
)
