Archived discussions · Captured October 28, 2026

Box Plot-Adding HoverTool Tool Tips

chandrasekhar.subscrFeb 10, 2016 #1

Hi Team,

Please help with this issue.

I’m trying to create a Box Plot with outliers and with Hover tools. The issue i’m facing is explained through the below code snippet

My code looks like this,

columns = ['A','B','C']
df = pd.DataFrame(tickets, columns=columns)

fig = BoxPlot(df, values='A', label='B',
                    color='B', xlabel='A Axis Label', ylabel='B Axis Label', plot_width=700,tools=TOOLS)

#Add tool tip

hover = HoverTool()
hover.tooltips = [
(“C Value”, “@C”)
]
fig.add_tools(hover)

Basically I want the tool tip to show value of column ‘C’ on hover.

But the value is not getting displayed. It is coming as ‘???’

What I found is if I give the column mentioned in ‘label’, in my case column ‘B’ for the tool tip , it works

This works
hover.tooltips = [
(“B Value”, “@B”)
]

I tried using ColumnDataSource etc. But none of the options worked.

What is that I’m doing wrong here. Anyone faced similar issue.


Please suggest.

Regards

Chandra

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Nick_RothFeb 10, 2016 #2

Currently you can only add tooltips for something that is assigned to an attribute of a chart. The reason this is is because a box plot aggregates values, which means column c could have many different values associated with each box. If you assigned c to some attribute of the chart then it would be in the resultant data and could produce a tooltip for it.

···

On Wednesday, February 10, 2016 at 7:35:15 AM UTC-6, chandrasekh...@gmail.com wrote:

Hi Team,

Please help with this issue.

I’m trying to create a Box Plot with outliers and with Hover tools. The issue i’m facing is explained through the below code snippet

My code looks like this,

columns = ['A','B','C']
df = pd.DataFrame(tickets, columns=columns)

fig = BoxPlot(df, values='A', label='B',
                    color='B', xlabel='A Axis Label', ylabel='B Axis Label', plot_width=700,tools=TOOLS)
#Add tool tip
hover = HoverTool()
hover.tooltips = [
(“C Value”, “@C”)
]
fig.add_tools(hover)
Basically I want the tool tip to show value of column ‘C’ on hover.
But the value is not getting displayed. It is coming as ‘???’
What I found is if I give the column mentioned in ‘label’, in my case column ‘B’ for the tool tip , it works
This works
hover.tooltips = [
(“B Value”, “@B”)
]
I tried using ColumnDataSource etc. But none of the options worked.
What is that I’m doing wrong here. Anyone faced similar issue.

Please suggest.

Regards

Chandra

⌁ Link to post

Panagiotis_ZarkadasFeb 12, 2016 #3

Hi,

I have asked a similar question here: Redirecting to Google Groups

It seems that the charts API does not work well with hover tool… correct me if I’ m wrong.

Regards,

···

On Wednesday, 10 February 2016 15:35:15 UTC+2, chandrasekh...@gmail.com wrote:

Hi Team,

Please help with this issue.

I’m trying to create a Box Plot with outliers and with Hover tools. The issue i’m facing is explained through the below code snippet

My code looks like this,

columns = ['A','B','C']
df = pd.DataFrame(tickets, columns=columns)

fig = BoxPlot(df, values='A', label='B',
                    color='B', xlabel='A Axis Label', ylabel='B Axis Label', plot_width=700,tools=TOOLS)
#Add tool tip
hover = HoverTool()
hover.tooltips = [
(“C Value”, “@C”)
]
fig.add_tools(hover)
Basically I want the tool tip to show value of column ‘C’ on hover.
But the value is not getting displayed. It is coming as ‘???’
What I found is if I give the column mentioned in ‘label’, in my case column ‘B’ for the tool tip , it works
This works
hover.tooltips = [
(“B Value”, “@B”)
]
I tried using ColumnDataSource etc. But none of the options worked.
What is that I’m doing wrong here. Anyone faced similar issue.

Please suggest.

Regards

Chandra

⌁ Link to post

systemJul 21, 2021 #4

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