Name of hoverdata right-side element?

[ilazariev]

What is the name of the element on the right of hoverdata? I don’t understand why it appears, and don’t know what to search for

P.S. If you have an idea why it appears despite this info already present inside hoverdata - that would be perfect

[farispriadi]

Hi @ilazariev ,

I assume you used plotly.graph_objects to create the bar chart.

The ‘A’ label text is name parameter of the trace.

why it appears ?
By default it will appear as trace[n] (trace0,trace1 etc.) but if you set name parameter it will show the value of name text.

How to hide A text that appear on the right side of hover data ?

You can configure custom hovertemplate parameter on fig.update_traces and put empty string between<extra></extra> tag.

Here is an example.

import plotly.graph_objects as go

x=['b', 'a', 'c', 'd']
fig = go.Figure(go.Bar(x=x, y=[2,5,1,9], name='Montreal'))
fig.add_trace(go.Bar(x=x, y=[1, 4, 9, 16], name='Ottawa'))
fig.add_trace(go.Bar(x=x, y=[6, 8, 4.5, 8], name='Toronto'))

fig.update_layout(barmode='group', xaxis={'categoryorder':'array', 'categoryarray':['d','a','c','b']})

# configure the hovertemplate
fig.update_traces(hovertemplate="X value: %{x}<br>" +
                                "Y value: %{y}<br>" +
                                "<extra></extra>")
fig.show()

[ilazariev]

thank you very much!