Index - N
| name | DataFrame.Functions | 
| nameOfColumn | DataFrame.Operations.Core | 
| NANOSECONDS | DataFrame.IO.Parquet.Types | 
| nestedTypeException | DataFrame.Internal.Expression | 
| newGrowingUnboxedVector | DataFrame.IO.CSV | 
| newGrowingVector | DataFrame.IO.CSV | 
| NoHeader | DataFrame.IO.CSV, DataFrame | 
| NoInference | DataFrame.IO.CSV, DataFrame | 
| NonColumnReferenceException | DataFrame.Errors, DataFrame | 
| nonNullValues | DataFrame.Operations.Core | 
| normalize | DataFrame.Internal.Expression | 
| not | DataFrame.Functions | 
| null | DataFrame.Internal.DataFrame, DataFrame | 
| nullFirst | DataFrame.IO.Parquet.Types | 
| nulls | DataFrame.Operations.Core | 
| nullValues | DataFrame.Operations.Core | 
| numChildren | DataFrame.IO.Parquet.Thrift | 
| numElements | DataFrame.Internal.Column | 
| Numeric | DataFrame.Internal.Types | 
| numRows | DataFrame.IO.Parquet.Thrift |