plotly / plotly/plotly.py

Support log axes for `histogram2dcontour` plots

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bug P3
Dominant language
Python
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Description

No log scale works:

lin-lin

import plotly.express as px
import plotly.graph_objects as go


df = px.data.gapminder().query("year == 2007")

fig = go.Figure()

scat = px.scatter(df, x="gdpPercap", y="lifeExp", hover_name="country", log_x=True)

contour = go.Histogram2dContour(x=df.gdpPercap, y=df.lifeExp)
fig.add_trace(contour)

fig.show()

With log scale:

log-log

import plotly.express as px
import plotly.graph_objects as go


df = px.data.gapminder().query("year == 2007")

fig = go.Figure()

scat = px.scatter(df, x="gdpPercap", y="lifeExp", hover_name="country", log_x=True)

contour = go.Histogram2dContour(x=df.gdpPercap, y=df.lifeExp)
fig.add_trace(contour)

fig.update_xaxes(type="log")
fig.update_yaxes(type="log")
fig.show()

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First steps

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the provided Python example with Histogram2dContour and log-scaled x and y axes, then trace the contour plot's axis handling in the Plotly graphing stack. Done means log-scaled axes render correctly for the contour plot and regression coverage verifies the behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
data-visualization
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
52/100

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