Traces in facet plot drawn outside of figure area.
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bug
P3
- Dominant language
- Python
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Description
Code to reproduce the issue:
import pandas as pd
import numpy as np
import plotly
import string
np.random.seed(0)
plotly.io.renderers.default = "browser"
COL_NAME = "Key"
FIGURE_HEIGHT = 12200
column_names = string.ascii_letters[0:20]
# FIGURE_HEIGHT = 7200 # This removes the issue
# column_names = string.ascii_letters[0:10] # This removes the issue
df = pd.DataFrame(np.random.randint(0,100,size=(100, len(column_names))), columns=list(column_names))
df.columns.name = COL_NAME
fig = plotly.express.line(df,facet_row=COL_NAME,height=FIGURE_HEIGHT)
fig.show()
Screenshot of what I'm seeing:

Issue may have to do with the height argument or the number of traces included in the figure, or some other aspect I don't suspect.
Thank you for the help and for the great visualization tool!
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First steps
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Research direction
Start with the provided reproduction using plotly.express.line with facet_row, a 12,200-pixel height, and 20 columns, then inspect the resulting figure through fig.show(). Compare it with the 7,200-pixel and 10-column cases that do not reproduce the issue; done means all traces remain inside the figure area for the failing case.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- numpy, pandas, plotly, python
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100