qgis_run_algorithm_p function

Run an algorithm using 'qgis_process': pipe-friendly wrapper

qgis_run_algorithm_p() wraps qgis_run_algorithm(), passing its first argument to the first argument of the QGIS algorithm. This makes it more convenient in a pipeline (hence '_p' in the name).

qgis_run_algorithm_p(
  .data,
  algorithm,
  ...,
  .select = "OUTPUT",
  .clean = TRUE,
  .quiet = TRUE
)

Arguments

• .data: Passed to the first input of algorithm. If .data is a qgis_result (the result of a previous processing step), .data[[.select]] is passed instead.
• algorithm: A qualified algorithm name (e.g., "native:buffer").
• ...: Other algorithm arguments. These values are evaluated once and immediately, so you shouldn't call qgis_tmp_file() here.
• .select: String. The name of the element to select from .data if the latter is a qgis_result. Defaults to "OUTPUT".
• .clean: Logical. Should an incoming qgis_result be cleaned (using qgis_clean_result()) after processing?
• .quiet: Use FALSE to get extra output from 'qgis_process'. This can be useful in debugging.

Returns

A qgis_result object.

Details

Uses qgis_function() under the hood.

Examples

system.file(
  "longlake/longlake_depth.gpkg",
  package = "qgisprocess"
) |>
  qgis_run_algorithm_p(
    "native:buffer",
    DISTANCE = 10
  )

See Also

Other functions to run one geoprocessing algorithm: qgis_run_algorithm()