README.md

metadata

configs:
  - config_name: benchmark_432
    data_dir: hf_viewer
    drop_labels: true

ChartBench-E Benchmark 432

This repository contains the frozen 432-sample benchmark build used in the paper:

ChartBench-E: a benchmark for evaluating stable chart-to-values reading under increasing information load

What Is Included

• hf_viewer/{train,validation,test}/
  • Hugging Face viewer-friendly split layout for the paper benchmark
• metadata/formal_all18_432.jsonl
  • canonical manifest for the 432 released samples
• metadata/splits/{train,val,test}.jsonl
  • split-specific manifests
• images/
  • rendered chart images for the 432 benchmark samples
• tables/
  • table-first ground-truth CSV files
• programs/
  • chart program / generation metadata JSON files
• objects/
  • object-level chart metadata JSON files
• evaluation/
  • truth files used by the formal paper workflow
• docs/chartbench_e_rebuilt_README.md
  • codebase README snapshot
• docs/chartbench_e_paper.pdf
  • paper PDF snapshot bundled with this release

Release Summary

• Samples: 432
• Chart families: 18
• Samples per chart family: 24
• Difficulty tiers:
  • L1: 144
  • L2: 144
  • L3: 144
• Splits:
  • train: 289
  • val: 50
  • test: 93

Data Fields

The public viewer layout in hf_viewer/{train,validation,test}/metadata.jsonl keeps a slimmer schema:

• sample_id
• chart_id
• chart_type
• chart_group
• image_path
• values
• n_series
• n_points
• difficulty_tier
• difficulty_components
• challenge_tags
• source_kind
• layout_family
• split
• suite_id
• annotation
• axis_scale
• x_labels
• series_labels
• candidate_pool
• table_path
• program_path
• object_path

The canonical audit manifest remains available in metadata/formal_all18_432.jsonl.

Notes

• This is the benchmark release cited by the manuscript.
• Code, prompt templates, evaluation scripts, and generation utilities live in:
  • https://github.com/luojueling/ChartBench-E
• The broader 7,506-sample released pool is published separately to keep this benchmark repo stable and viewer-friendly.

Suggested Citation

@misc{chartbenche2026benchmark,
  title        = {ChartBench-E Benchmark 432},
  author       = {Hui Long and Jueling Luo and Si Xie and Haoli Yu and Juncheng Ye and Xutao Deng},
  year         = {2026},
  howpublished = {\url{https://huggingface.co/datasets/xiaoluo11/ChartBench-E}},
  note         = {Frozen 432-sample benchmark release used in the manuscript}
}

License

This release contains synthetic benchmark artifacts assembled for research evaluation. A project-level license statement should be added or updated before wider redistribution beyond the current release workflow.