Heatmap changing x,y and z label on tooltip

📊 Plotly Python
1

I have heatmap where data plot only using go.Heatmap(z=myData, colobar=..
How can I change x , y and z label on tooltip to anything else?

1 Like
2

Hi,

I think the documentation page on hover text and formatting should help you get started:

  • Greetings, Alex
3

@Alexboiboi unfortunately this didn’t help. I found one post related to my problem, but I am thinking solution should me straight forward.

4

Hi @mtkilic,

You can specify your exact hover text by setting the heatmap trace’s text property to a 2D array of strings and then setting the heatmap’s hoverinfo property to 'text'. Feel free to share a full example and a description of what you want to display in the tooltip if you’d like more help working through it.

Hope that helps!

-Jon

5 
import plotly.io as pio
import plotly.graph_objs as go
pio.renderers.default = 'iframe'
trace = go.Heatmap(z=[[5, 7, 11], [8, 10, 12]], colorbar = dict(title='Range'))
data = [trace]

layout = go.Layout(xaxis=go.layout.XAxis(
    title=go.layout.xaxis.Title(
        text='Depth Axis',
    )),
yaxis=go.layout.YAxis(
    title=go.layout.yaxis.Title(
        text='Time Axis',
    )
))
f6 = go.FigureWidget(data, layout=layout)
pio.show(f6)

@jmmease I am trying to change the label. If you look at the below image, I would like to make tooltip looks like
Depth: 0
Time: 1
Range: 8

heatmap
heatmap.PNG1575×664 19.8 KB

I have this solution but I think there should be easier way

for yi, yy in enumerate(z):
    hovertext.append(list())
    for xi, xx in enumerate(z[0]):
        hovertext[-1].append('Depth: {}<br />Time: {}<br />Range: {}'.format(xi, yi, z[yi][xi]))

One reason I dont want to do above code is the Time complexity. Because I have fairly big data set.

6

Hi @mtkilic,

You could do this using a hovertemplate.

import plotly.io as pio
import plotly.graph_objs as go
pio.renderers.default = 'iframe'
trace = go.Heatmap(
    z=[[5, 7, 11], [8, 10, 12]],
    colorbar = dict(title='Range'),
    hovertemplate='Depth: %{x}<br>Time: %{y}<br>Range: %{z}<extra></extra>'
    
)
data = [trace]

layout = go.Layout(xaxis=go.layout.XAxis(
    title=go.layout.xaxis.Title(
        text='Depth Axis',
    )),
yaxis=go.layout.YAxis(
    title=go.layout.yaxis.Title(
        text='Time Axis',
    )
))
f6 = go.Figure(data, layout=layout)
pio.show(f6)

Screenshot_20190521_060644
Screenshot_20190521_060644.png880×488 14.8 KB

Hope that helps.
-Jon

4 Likes
7

Hi @jmmease ,
This works great. Thank you!

1 Like
8

Thank you so much. My faith in humanity has been restored!

1 Like