Add metadata.json

metadata.json

@@ -0,0 +1,17 @@
+{
+  "READY": true,
+  "name": "Tox21_NRER",
+  "task": "binary",
+  "num_classes": 2,
+  "cat_idx": [],
+  "num_samples": 6186,
+  "num_features": 1024,
+  "imbalance_ratio": 6.8205,
+  "description": "Qualitative toxicity measurements on 12 biological targets including nuclear receptors and stress response pathways. Task: predict 'NR-ER'. Features: Morgan fingerprints (radius=2).",
+  "source": "MoleculeNet (https://moleculenet.org) \u2014 loaded via DeepChem.",
+  "label": "Drug Discovery",
+  "sub_labels": [
+    "Physiology",
+    "Fingerprint"
+  ]
+}