Image plot: coordinates/positions do not update
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- Dominant language
- Python
- Stars
- 12
- Forks
- 6
- PR merge metrics
- No merged PRs in 30d
Description
Doing
import plopp as pp
%matplotlib widget
n = pp.Node(pp.data.data2d())
f = pp.plot(n)
f
and then
new = pp.data.data2d() * 2.0
new.coords['x'] *= 0.5
n.func = lambda: new
n.notify_children("")
updates the colors but not the positions of the points.
Note that for pcolormesh, if the number of points have changed, we probably need to remove the mesh and create a bew one, as in #484
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 update path exercised by pp.Node and pp.plot, then inspect the pcolormesh handling referenced in issue #484. Run the provided Python reproducer and verify that changing new.coords['x'] updates point positions; when the point count changes, confirm the mesh is recreated rather than reused.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- matplotlib, python
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 50/100