stats: histogram
Nobody has claimed this yet.
- Dominant language
- C
- Stars
- 23
- Forks
- 2
- PR merge metrics
- No merged PRs in 30d
Description
Add numx_stats_histogram to the stats module.
Contract: bin a fixed-size array into a caller-supplied number of equal-width bins over [min, max] of the data (or caller-specified range), output bin counts into a caller-provided buffer. No dynamic allocation, bounded by NUMX_MAX_VEC_SIZE like the rest of stats.
Follow CONTRIBUTING.md exactly: full Doxygen header, NULL-checks, numx_status_t return, all four deliverables (header, impl, test, docs page). Test levels per CONTRIBUTING.md: L1 known-answer, L2 property (bin counts sum to n), L3 edge cases (single bin, all-same-value data), L4 error handling.
See src/stats.c for the existing module's style (e.g. numx_stats_mean, numx_stats_percentile) to match conventions.
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
Read CONTRIBUTING.md and inspect src/stats.c, especially numx_stats_mean and numx_stats_percentile, to follow the module's conventions. Implement the header, implementation, test, and documentation page with the specified fixed-buffer contract and validation. Run the L1-L4 tests covering known answers, count-sum properties, edge cases, and errors.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- data
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Quiet
- Clarity
- Clearly specified
- Newbie friendliness
- 64/100