geom_step truncating line too early before null value
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bug
ggplotly
- Dominant language
- R
- Stars
- 2.7k
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- 641
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Description
It seems that geom_step is truncating the line too early when it encounters a null value. Rather than continue the line until the null value, it stops at the prior value:
Example:
ggplot(data.frame(x=1:5, y=c(1,2,NA,1,1)), aes(x,y)) + geom_step()
Plain ggplot2:

Plotly:

Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the geom_step implementation and its handling of null or NA values, using the issue's R example to reproduce the discrepancy. Compare the Plotly output with plain ggplot2 and verify that the step line remains extended through the value before NA rather than ending prematurely.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100