| Interface | Description | 
|---|---|
| Matrix | Trait for a local matrix. | 
| Vector | Represents a numeric vector, whose index type is Int and value type is Double. | 
| Class | Description | 
|---|---|
| BLAS | BLAS routines for MLlib's vectors and matrices. | 
| DenseMatrix | Column-major dense matrix. | 
| DenseVector | A dense vector represented by a value array. | 
| JsonMatrixConverter | |
| JsonVectorConverter | |
| Matrices | Factory methods for  Matrix. | 
| SparseMatrix | Column-major sparse matrix. | 
| SparseVector | A sparse vector represented by an index array and a value array. | 
| SQLDataTypes | SQL data types for vectors and matrices. | 
| Vectors | Factory methods for  Vector. |