hca

hca queries the Human Cell Atlas data repository for single-cell experiment data and retrieves summary information from projects, files, samples, and bundles indexes.

Key Features:

• Index Query Functions: The `projects()`, `files()`, `samples()`, and `bundles()` functions retrieve summary information on each of these indexes.
• Detail Retrieval: Corresponding `*_details()` functions are available for individual entries of each index.
• File Download: File-based resources can be downloaded using `files_download()`.
• Advanced Query Handling: The package supports paging through large result sets and flexible querying of the 'list-of-lists' structure representing query responses.

Scientific Applications:

• Human Cell Atlas Data Access: Querying and retrieving single-cell experiment data from the Human Cell Atlas Data Coordinating Platform.
• Single-Cell Data Exploration: Accessing project, sample, file, and bundle metadata to support downstream single-cell analysis workflows.

Methodology:

The package interfaces with the Human Cell Atlas data repository through index-based query functions and returns responses as a 'list-of-lists' structure.