Detection Skills
Find nulls, blanks, sentinels, and suspicious placeholders. Compare missing counts, percentages, row completeness, and missingness patterns before choosing any treatment.
Score0
Lives3
Time00:00
Completeness0%
Rows retained0
Model score0.00
Rescue Mission
CompleteMissing or invalidSelected column
Click a canvas cell to inspect it. Click a column label to target that feature.
Visual Diagnostics
Method Guidance
Use medians for skewed numeric features. Use modes or explicit categories for labels. Prefer grouped methods when different segments have meaningfully different distributions.
Leakage and Bias
Never use future observations to repair past records during realistic forecasting. Avoid imputing protected targets, identifiers, or values whose absence carries important information.