如何在Dash应用程序中创建带有平均线的条形图?
问题描述
您好,有人能提供一个如何在Dash中创建带有中线的条形图的代码示例吗?
我设法创建了一个条形图,但我找不到如何通过回调函数输出将跟踪添加到现有的dcc.Graph。非常感谢。
这是图表外观的示例:
以下是我尝试过的一些代码片段:
html.Div([
dcc.Graph(id='surprice_pct_last_month1'),
],style={'width': '48%', 'display': 'inline-block'}),
和
@app.callback(
dash.dependencies.Output('surprice_pct_last_month2', 'figure'),
[dash.dependencies.Input('currency2', 'value')])
def update_surprise_last_month2(currency2):
output = calendar[calendar.Currency == currency2]
output = output.groupby('Event').last()
output = output.dropna()
output1 = output[(output.Surprise_Pct < 400) & (output.Surprise_Pct > -400)]
output2 = output[(output.Surprise_Pct > 399) | (output.Surprise_Pct < -399)]
output['Mean'] = output.Surprise_Pct.mean()
output['Median'] = output.Surprise_Pct.median()
#output2['Mean'] = output2.Surprise_Pct.mean()
#output2['Median'] = output2.Surprise_Pct.median()
data = []
trace_data = go.Bar(x=list(output.index),
y=list(output.Surprise_Pct))
data.append(trace_data)
layout = {'title':'Monthly Surprises - {}'.format(currency2)}
return {
'data':data,
'layout': layout
}
解决方案
这是您需要的吗?
import plotly.graph_objects as go
import random
y = [random.randrange(-200,200) for _ in range(80)]
mean = sum(y) / len(y)
fig = go.Figure([go.Bar(x=list(range(len(y))), y=y)])
fig.add_shape(
go.layout.Shape(
type="line",
x0=-.5,
y0=mean,
x1=len(y)-.5,
y1=mean,
line=dict(
color="Orange",
width=4,
dash="dash",
),
))
fig.show()
ps:This online example表示数据只是一个字典列表。因此,为了让Dash发挥作用,我建议:
tracedata1 = go.Bar(x=x, y=y)
tracedata2 = go.layout.Shape(type="line", ...)
data.append(trace_data1)
data.append(trace_data2)
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