您可以使用 Plotly 的新Dash 框架从 Plotly 图表中获取所选数据。
在“Graph Crossfiltering”下的文档中有一个示例https://plot.ly/dash/getting-started-part-2
我粘贴了下面的完整示例只是为了保存历史。
在下面的每个回调中,您都可以访问选定的点、刚刚悬停的点或刚刚单击的点。这个应用程序只是在应用程序中显示点的值,但你可以对这些点做任何事情(例如计算其他东西)。
import dash
from dash.dependencies import Input, Output
import dash_core_components as dcc
import dash_html_components as html
import json
app = dash.Dash(__name__)
app.layout = html.Div([
dcc.Graph(
id='basic-interactions',
figure={
'data': [
{
'x': [1, 2, 3, 4],
'y': [4, 1, 3, 5],
'text': ['a', 'b', 'c', 'd'],
'customdata': ['c.a', 'c.b', 'c.c', 'c.d'],
'name': 'Trace 1',
'mode': 'markers',
'marker': {'size': 12}
},
{
'x': [1, 2, 3, 4],
'y': [9, 4, 1, 4],
'text': ['w', 'x', 'y', 'z'],
'customdata': ['c.w', 'c.x', 'c.y', 'c.z'],
'name': 'Trace 2',
'mode': 'markers',
'marker': {'size': 12}
}
]
}
),
html.Div([
dcc.Markdown("""
**Hover Data**
Mouse over values in the graph.
""".replace(' ', '')),
html.Pre(id='hover-data')
], style=styles['column']),
html.Div([
dcc.Markdown("""
**Click Data**
Click on points in the graph.
""".replace(' ', '')),
html.Pre(id='click-data'),
], style=styles['column']),
html.Div([
dcc.Markdown("""
**Selection Data**
Choose the lasso or rectangle tool in the graph's menu
bar and then select points in the graph.
""".replace(' ', '')),
html.Pre(id='selected-data'),
])
])
@app.callback(
Output('hover-data', 'children'),
[Input('basic-interactions', 'hoverData')])
def display_hover_data(hoverData):
#
# This is where you can access the hover data
# This function will get called automatically when you hover over points
# hoverData will be equal to an object with that data
# You can compute something off of this data, and return it to the front-end UI
#
return json.dumps(hoverData, indent=2)
@app.callback(
Output('click-data', 'children'),
[Input('basic-interactions', 'clickData')])
def display_click_data(clickData):
# Similarly for data when you click on a point
return json.dumps(clickData, indent=2)
@app.callback(
Output('selected-data', 'children'),
[Input('basic-interactions', 'selectedData')])
def display_selected_data(selectedData):
# Similarly for data when you select a region
return json.dumps(selectedData, indent=2)
if __name__ == '__main__':
app.run_server(debug=True)