| name | DataFrame.Operators, DataFrame.Functions, DataFrame |
| NamedExpr | DataFrame.Internal.Expression |
| nameOfColumn | DataFrame.Operations.Core |
| NANOSECONDS | DataFrame.IO.Parquet.Types |
| nColumns | |
| 1 (Function) | DataFrame.Operations.Core, DataFrame |
| 2 (Function) | DataFrame.Typed.Operations, DataFrame.Typed |
| NDouble | DataFrame.DecisionTree |
| newMutableColumn | DataFrame.Internal.Column |
| newPagedUnboxedVector | DataFrame.IO.CSV |
| newPagedVector | DataFrame.IO.CSV |
| NMaybeDouble | DataFrame.DecisionTree |
| NoAssumption | DataFrame.Operations.Typing |
| NoHeader | DataFrame.IO.CSV, DataFrame |
| NoInference | DataFrame.IO.CSV, DataFrame |
| NonColumnReferenceException | DataFrame.Errors, DataFrame |
| nonNullValues | DataFrame.Operations.Core |
| normalize | |
| 1 (Function) | DataFrame.Internal.Expression |
| 2 (Function) | DataFrame.Functions |
| not | |
| 1 (Function) | DataFrame.Functions |
| 2 (Function) | DataFrame.Typed.Expr, DataFrame.Typed |
| nRows | |
| 1 (Function) | DataFrame.Operations.Core, DataFrame |
| 2 (Function) | DataFrame.Typed.Operations, DataFrame.Typed |
| null | DataFrame.Internal.DataFrame, DataFrame |
| NullableArithOp | DataFrame.Internal.Nullable |
| NullableCmpOp | DataFrame.Internal.Nullable |
| nullArithOp | DataFrame.Internal.Nullable |
| nullCmpOp | DataFrame.Internal.Nullable |
| NullCmpResult | DataFrame.Internal.Nullable |
| nullFirst | DataFrame.IO.Parquet.Types |
| nullLift | |
| 1 (Function) | DataFrame.Functions |
| 2 (Function) | DataFrame.Typed.Expr, DataFrame.Typed |
| NullLift1Op | DataFrame.Internal.Nullable |
| NullLift1Result | DataFrame.Internal.Nullable |
| nullLift2 | |
| 1 (Function) | DataFrame.Functions |
| 2 (Function) | DataFrame.Typed.Expr, DataFrame.Typed |
| NullLift2Op | DataFrame.Internal.Nullable |
| NullLift2Result | DataFrame.Internal.Nullable |
| nulls | DataFrame.Operations.Core |
| nullValues | DataFrame.Operations.Core |
| numChildren | DataFrame.IO.Parquet.Thrift |
| numColumns | DataFrame.IO.CSV, DataFrame |
| numElements | DataFrame.Internal.Column |
| Numeric | DataFrame.Internal.Types |
| numericCols | DataFrame.DecisionTree |
| numericConditions | DataFrame.DecisionTree |
| numericExprs | DataFrame.DecisionTree |
| numericExprsWithTerms | DataFrame.DecisionTree |
| NumericWidenOp | DataFrame.Internal.Nullable |
| NumExpr | DataFrame.DecisionTree |
| numExprCols | DataFrame.DecisionTree |
| numExprEq | DataFrame.DecisionTree |
| numRows | DataFrame.IO.Parquet.Thrift |