1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
"""
Layered Histogram
=================
This example shows how to use opacity to make a layered histogram in Altair.
"""
# category: histograms
import pandas as pd
import altair as alt
import numpy as np
np.random.seed(42)
# Generating Data
source = pd.DataFrame({
'Trial A': np.random.normal(0, 0.8, 1000),
'Trial B': np.random.normal(-2, 1, 1000),
'Trial C': np.random.normal(3, 2, 1000)
})
alt.Chart(source).transform_fold(
['Trial A', 'Trial B', 'Trial C'],
as_=['Experiment', 'Measurement']
).mark_bar(
opacity=0.3,
binSpacing=0
).encode(
alt.X('Measurement:Q', bin=alt.Bin(maxbins=100)),
alt.Y('count()', stack=None),
alt.Color('Experiment:N')
)
|
