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            0.3320000000000001,
            0.33320000000000005,
            0.33440000000000003,
            0.3356,
            0.3368,
            0.3380000000000001,
            0.33920000000000006,
            0.34040000000000004,
            0.3416,
            0.3428,
            0.34400000000000003,
            0.3452,
            0.34640000000000004,
            0.3476,
            0.3488,
            0.35000000000000003,
            0.3512,
            0.35240000000000005,
            0.3536,
            0.3548,
            0.356,
            0.3572,
            0.35840000000000005,
            0.35960000000000003,
            0.3608,
            0.362,
            0.3632,
            0.36440000000000006,
            0.36560000000000004,
            0.3668,
            0.368,
            0.36920000000000003,
            0.37040000000000006,
            0.37160000000000004,
            0.3728,
            0.374,
            0.3752,
            0.37639999999999996,
            0.37760000000000005,
            0.3788,
            0.38
          ]
        }
      ],
      "xlabel": "Constructed contamination fraction",
      "ylabel": "Allele frequency",
      "logx": false,
      "logy": false
    }
  ],
  "title": "Unequal sampling and contamination affect different layers",
  "assumptions": "Historical A fraction0.3; fixed relative sampling. Ancient allele frequency0.2, contaminant0.8. No ancient genomes, identities or demographic estimates.",
  "worked": "A取样机会为其他群体三倍时，样本A比例0.9/(0.9+0.7)=0.5625；污染占20%时构造位点频率由0.2变0.32。",
  "checks": {
    "sample_pi_r3": 0.5625,
    "contaminated_c02": 0.32,
    "inverse_pi": 0.3
  },
  "generator_source_sha256": {
    "ops/datacenter/editorial_guides/horizons_figures.py": "5ed0031cf4cbcfb7d2d78b4385c8c29200a8312d53744507241da3ca5ca44a9c",
    "ops/datacenter/editorial_guides/deep_figures.py": "158969d9b1f5a4bd13906cf78dd71affc2692df9194593918059d861a6f59c85"
  },
  "source_ids": [
    "h-admixture2012",
    "h-europe2025"
  ],
  "formula_source": "Article equations and this versioned script",
  "diagram_nodes": [
    "Permitted samples",
    "Authentication and dates",
    "Kinship structure",
    "Reference models",
    "Sampling sensitivity",
    "Historical alternatives"
  ]
}