Python Altair 条形图 - 如何更改条形图的数量？

Question

我是 Altair 的新手，我想更改条形图中绘制的条形数量。我在网上做了一些研究，但找不到任何有用的东西。这是我的代码：

import altair as alt
import pandas as pd
import numpy as np

# Generate a random np array of size 1000, and our goal is to plot its distribution.
my_numbers = np.random.normal(size = 1000)
my_numbers_df = pd.DataFrame.from_dict({'Integers': my_numbers})

alt.Chart(my_numbers_df).mark_bar(size = 10).encode(
    alt.X("Integers", 
          bin = True,
          scale = alt.Scale(domain=(-5, 5))
    ),
    y = 'count()',
)

现在的剧情是这样的

Answer 1

您可以通过传递 alt.Bin() 对象并指定 maxbins

来增加 bin 的数量

import altair as alt
import pandas as pd
import numpy as np

# Generate a random np array of size 1000, and our goal is to plot its distribution.
my_numbers = np.random.normal(size = 1000)
my_numbers_df = pd.DataFrame.from_dict({'Integers': my_numbers})

alt.Chart(my_numbers_df).mark_bar(size = 10).encode(
    alt.X("Integers", 
          bin = alt.Bin(maxbins=25),
          scale = alt.Scale(domain=(-5, 5))
    ),
    y = 'count()',

)

Python Altair 条形图 - 如何更改条形图的数量？

Python Altair Bar Plots - How to change the number of bars?

python

visualization

altair