This program works, but I get a JSON error randomly.
I get random errors when I move the mouse hover quickly.
import dash
import dash_core_components as dcc
import dash_html_components as html
import numpy as np
import plotly.graph_objs as go
from dash.dependencies import Input, Output
example1 = np.random.rand(128, 128)
example2 = np.random.rand(128, 128)
example3= np.random.rand(128, 128, 512)
example4 = np.random.rand(128, 128, 512)
example5 = np.random.rand(512)
app = dash.Dash()
app.layout = html.Div([
html.Div(
html.H1('example')),
dcc.Dropdown(
id = 'select',
options = [{'value': 'heatmap1', 'label': 'heatmap1'},
{'value': 'heatmap2', 'label': 'heatmap2'}],
value = 'heatmap1'),
html.Div([
dcc.Graph(
id = 'image',
style = {'width': 600,
'display': "inline-block",
'verticalAlign': 'top'},
figure={}),
dcc.Graph(
id = 'small',
style = {'width': 600,
'display': 'inline-block',
'verticalAlign': 'top'},
figure={}),
dcc.Graph(
id = 'deflection',
style = {'width': 600,
'display': 'inline-block',
'verticalAlign': 'top'},
figure= {})])])
@app.callback(
Output('small', 'figure'),
[Input('image', 'hoverData')])
def update(hoverData):
if hoverData is None:
raise dash.exceptions.PreventUpdate
else:
selectx = hoverData['points'][0]['x']
selecty = hoverData['points'][0]['y']
select_example1 = example3[selecty, selectx, :]
select_example2 = example4[selecty, selectx, :]
fig1 = go.Figure()
fig1.add_trace(go.Scatter(
x = example5,
y = select_example1,
mode = 'markers')
)
fig1.add_trace(go.Scatter(
x = example5,
y = select_example2,
mode = 'markers')
)
return fig1
@app.callback(
Output('image', 'figure'),
[Input('select', 'value')])
def mapping(factor):
fig3 = go.Figure()
if factor == 'heatmap1':
fig3.add_trace(go.Heatmap(z = example1))
fig3.update_layout(yaxis = dict(scaleanchor = 'x'))
else:
fig3.add_trace(go.Heatmap(z = example2))
fig3.update_layout(yaxis = dict(scaleanchor = 'x'))
return fig3
if __name__ == '__main__':
app.run_server(debug=True)
error code
Can you tell me if there is a solution?
