DataBackend: DataBackend Abstract Class

In riemtan: Riemannian Metrics for Symmetric Positive Definite Matrices

DataBackend Abstract Class

Description

Abstract base class defining the interface for storage backends. All backend implementations must inherit from this class and implement the required methods.

Details

This class provides a common interface for different storage strategies:

• ListBackend: In-memory list storage (current default)

• ParquetBackend: Lazy-loaded Parquet files with LRU cache

Methods

Public methods

• DataBackend$get_matrix()

• DataBackend$get_all_matrices()

• DataBackend$length()

• DataBackend$get_dimensions()

• DataBackend$clone()

---

Method get_matrix()

Get a specific matrix by index

Usage

DataBackend$get_matrix(i)

Arguments

i

Integer index of the matrix to retrieve

Returns

A dppMatrix object

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Method get_all_matrices()

Get all matrices

Usage

DataBackend$get_all_matrices()

Returns

A list of dppMatrix objects

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Method length()

Get the number of matrices

Usage

DataBackend$length()

Returns

Integer count of matrices

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Method get_dimensions()

Get matrix dimensions

Usage

DataBackend$get_dimensions()

Returns

Integer dimension (p) where matrices are p x p

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Method clone()

The objects of this class are cloneable with this method.

Usage

DataBackend$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

riemtan documentation built on Nov. 11, 2025, 1:06 a.m.