使堆栈条形图绘制不同的颜色

Question

所以我正在创建一个堆叠的 plotly 条形图。我的每个堆栈都返回相同的颜色。我希望它们有不同的颜色。在这种情况下，我不想使用 plotly express。我也不想指定颜色。我只想要各种颜色。这是我的代码：

  df2 = pd.DataFrame.from_dict({'Country': {0: 'Europe',
  1: 'America',
  2: 'Asia',
  3: 'Europe',
  4: 'America',
  5: 'Asia',
  6: 'Europe',
  7: 'America',
  8: 'Asia',
  9: 'Europe',
  10: 'America',
  11: 'Asia'},
 'Year': {0: 2014,
  1: 2014,
  2: 2014,
  3: 2015,
  4: 2015,
  5: 2015,
  6: 2016,
  7: 2016,
  8: 2016,
  9: 2017,
  10: 2017,
  11: 2017},
 'Amount': {0: 1600,
  1: 410,
  2: 150,
  3: 1300,
  4: 300,
  5: 170,
  6: 1000,
  7: 500,
  8: 200,
  9: 900,
  10: 500,
  11: 210}})

fig = go.Figure()
fig.add_trace(go.Bar(x=df2['Year'], y=df['Amount'], 
                        ))
fig.update_layout(title="Personnel at Work",
                 barmode='stack')
fig.show()

Answer 1

要使用图形对象创建堆叠图形，您可以将图形指定为堆叠单元。

import pandas as pd
import plotly.graph_objects as go

fig = go.Figure()

x = [str(x) for x in df2['Year'].unique().tolist()]

for c in df2['Country'].unique():
    df3 = df2.query('Country == @c')
    fig.add_trace(go.Bar(x=x, y=df3['Amount'], name=c))
fig.update_layout(title="Personnel at Work", barmode='stack')
fig.show()

使堆栈条形图绘制不同的颜色

Make Stack Bar Chart Plotly Different Colors

python

bar-chart

pandas

plotly-python