pixieweb 0.1.0

Initial CRAN release.

Documentation

• Improved quickstart vignette: explains ContentsCode, elimination, _text columns, and adds inline ggplot comments.
• Improved introduction vignette: navigation help, clearer elimination explanation, “Advanced features” marker, and motivation for codelists/wide output/query composition/saved queries.
• Improved multi-api vignette: honest framing of cross-country challenges, guidance on finding comparable tables, actionable tips, and cross-references.
• Fixed Unicode ≤ in prepare_query() documentation that caused LaTeX PDF manual errors.

Features

• API connection: px_api() creates reusable connection objects for any PX-Web API (SCB, SSB, Statistics Finland, etc.) with automatic version detection (v1/v2).
• API availability: px_available() performs a lightweight connectivity check, used to guard examples and tests.
• Table discovery: get_tables() searches and lists available tables with support for both v1 (tree-walking) and v2 (search endpoint) APIs.
• Variable inspection: get_variables() retrieves variable metadata for any table, including value lists and selection types.
• Data retrieval: get_data() downloads data with automatic query construction, chunking for large requests, and rate limiting.
• Codelists: get_codelists() retrieves codelist metadata; codelist_values() and codelist_describe() for inspection.
• Selection helpers: px_all(), px_top(), px_bottom(), px_from(), px_to(), px_range() for concise variable selections.
• Query workflow: prepare_query() for interactive query building; compose_table_query(), compose_data_query(), execute_query() for programmatic access.
• Saved queries: save_query() and get_saved_query() for persisting and reloading query specifications.
• Table helpers: table_search(), table_describe(), table_enrich(), table_minimize(), table_extract_ids() for working with table metadata.
• Variable helpers: variable_search(), variable_describe(), variable_minimize(), variable_extract_ids(), variable_name_to_code(), variable_values() for working with variables.
• Data helpers: data_minimize(), data_comments(), data_legend() for working with downloaded data.
• Persistent caching: pixieweb_cache_dir() and pixieweb_clear_cache() for managing cached API responses using tools::R_user_dir().
• Citations: px_cite() generates citations for downloaded data.
• HTTP resilience: Automatic retry with exponential backoff for transient errors and rate limiting (HTTP 429).
• Built-in API catalogue: Ships with a catalogue of known PX-Web APIs for Nordic and European statistical agencies.

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