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"""
Compact Trellis Grid of Bar Charts
==================================
This example shows a simple grid of bar charts to compare performance data..
"""
# category: bar charts
import altair as alt
import pandas as pd
source = pd.DataFrame(
[
{"a": "a1", "b": "b1", "c": "x", "p": "0.14"},
{"a": "a1", "b": "b1", "c": "y", "p": "0.60"},
{"a": "a1", "b": "b1", "c": "z", "p": "0.03"},
{"a": "a1", "b": "b2", "c": "x", "p": "0.80"},
{"a": "a1", "b": "b2", "c": "y", "p": "0.38"},
{"a": "a1", "b": "b2", "c": "z", "p": "0.55"},
{"a": "a1", "b": "b3", "c": "x", "p": "0.11"},
{"a": "a1", "b": "b3", "c": "y", "p": "0.58"},
{"a": "a1", "b": "b3", "c": "z", "p": "0.79"},
{"a": "a2", "b": "b1", "c": "x", "p": "0.83"},
{"a": "a2", "b": "b1", "c": "y", "p": "0.87"},
{"a": "a2", "b": "b1", "c": "z", "p": "0.67"},
{"a": "a2", "b": "b2", "c": "x", "p": "0.97"},
{"a": "a2", "b": "b2", "c": "y", "p": "0.84"},
{"a": "a2", "b": "b2", "c": "z", "p": "0.90"},
{"a": "a2", "b": "b3", "c": "x", "p": "0.74"},
{"a": "a2", "b": "b3", "c": "y", "p": "0.64"},
{"a": "a2", "b": "b3", "c": "z", "p": "0.19"},
{"a": "a3", "b": "b1", "c": "x", "p": "0.57"},
{"a": "a3", "b": "b1", "c": "y", "p": "0.35"},
{"a": "a3", "b": "b1", "c": "z", "p": "0.49"},
{"a": "a3", "b": "b2", "c": "x", "p": "0.91"},
{"a": "a3", "b": "b2", "c": "y", "p": "0.38"},
{"a": "a3", "b": "b2", "c": "z", "p": "0.91"},
{"a": "a3", "b": "b3", "c": "x", "p": "0.99"},
{"a": "a3", "b": "b3", "c": "y", "p": "0.80"},
{"a": "a3", "b": "b3", "c": "z", "p": "0.37"},
]
)
alt.Chart(source, width=60, height=alt.Step(8)).mark_bar().encode(
y=alt.Y("c:N", axis=None),
x=alt.X("p:Q", title=None, axis=alt.Axis(format="%")),
color=alt.Color(
"c:N", title="settings", legend=alt.Legend(orient="bottom", titleOrient="left")
),
row=alt.Row("a:N", title="Factor A", header=alt.Header(labelAngle=0)),
column=alt.Column("b:N", title="Factor B"),
)
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