Show multiple hover infos from one hover in pie charts

📊 Plotly Python
1

If I have multiple pie charts is it possible to make it so when I hover over a slice in one pie chart the hover info for the same slice in the other charts also shows?

1 Like
2

Hi Evecon131, Welcome to the community.

Yes, this is possible with a bit of patience. I say patience as I have run out of mine now, but I think I have what you need.
You need to create custom hovertemplates to get you the information you need.

The code below demonstrates this, but don’t pick me up on it not summing the figures correctly. I got tired of trying to find the issue.

The code works and displays what I think you need.
I am using Plotly offline as I am using Pycharm, not Jupyter.

import plotly.graph_objects as go
from plotly.subplots import make_subplots
from plotly.offline import plot

# Create the data for the pie charts
labels = ["Category A", "Category B", "Category C"]
values1 = [20, 40, 40]
values2 = [40, 20, 40]
values3 = [40, 40, 20]

# Create the hovertemplate for Pie Chart 1, displaying values for each category and the sum
hovertemplate_1 = (
    "<b>%{label}</b><br>Pie Chart 1: %{value}<br>"
    "Pie Chart 2: %{data.values[0]}<br>"
    "Pie Chart 3: %{data.values[1]}<br>"
    "<br>"
    "Sum of %{label}: %{customdata[0]}<br>"
)

# Create the hovertemplate for Pie Charts 2 and 3, displaying values only
hovertemplate_2 = "<b>%{label}</b><br>Pie Chart 2: %{value}<br>"
hovertemplate_3 = "<b>%{label}</b><br>Pie Chart 3: %{value}<br>"

# Calculate the sum of the values for each category in Pie Chart 1
sum_category_a = sum([values1[0], values2[0], values3[0]])
sum_category_b = sum([values1[1], values2[1], values3[1]])
sum_category_c = sum([values1[2], values2[2], values3[2]])

# Create the subplots with 1 row and 3 columns
fig = make_subplots(
    rows=1,
    cols=3,
    specs=[[{"type": "pie"}, {"type": "pie"}, {"type": "pie"}]],
    subplot_titles=["Pie Chart 1", "Pie Chart 2", "Pie Chart 3"],
)

# Add the first pie chart to the subplot
fig.add_trace(
    go.Pie(
        labels=labels,
        values=values1,
        hovertemplate=hovertemplate_1,
        textinfo="value",
        customdata=[sum_category_a, sum_category_b, sum_category_c],
    ),
    row=1,
    col=1,
)

# Add the second pie chart to the subplot
fig.add_trace(
    go.Pie(
        labels=labels, values=values2, hovertemplate=hovertemplate_2, textinfo="value"
    ),
    row=1,
    col=2,
)

# Add the third pie chart to the subplot
fig.add_trace(
    go.Pie(
        labels=labels, values=values3, hovertemplate=hovertemplate_3, textinfo="value"
    ),
    row=1,
    col=3,
)

# Set the hovermode to 'closest' for the subplot
fig.update_layout(hovermode="closest")

# Plot the figure
plot(fig)

Which results in the following Pie Charts

image
image3733×1699 140 KB

Hopefully, this will get you working.

1 Like
4

Ah thank you so much! This helps so much! My patience was totally exhausted trying to get this. If you’re able to muster up the patience, would it be possible to make is so the hover info on all the red slices on each graph pop up when you hover over one of them? So three separate hover boxes pop up when hovering over 1.

5

That will be an interesting challenge. let me see what I can cobble together on the way home. The issue will be that the hovertemplate works on a mouseover event I think.

Are you still looking for the sum of all the categories to be on the first pie chart as well?

6

Oh no need for the sum, just want to try to get the slices on the other pies for that label to appear. Thank you!

7

I think I have to throw the towel in here. I do not think this functionality is possible. I believe each chart is its own object with its own properties. Trying to fire hovertext on pie charts 2 & 3, when hovering over pie chart 1 just doesn’t work.

Perhaps @AnnMarieW or @adamschroeder can opine on this?