QGIS Algorithm provided by QGIS (native c++) Random extract (native:randomextract). This algorithm takes a vector layer and generates a new one that contains only a subset of the features in the input layer. The subset is defined randomly, using a percentage or count value to define the total number of features in the subset. —————- Notes —————- - This algorithm drops existing primary keys or FID values and regenerates them in output layers.
qgis_randomextract(
INPUT = qgisprocess:::qgis_default_value(),
METHOD = qgisprocess:::qgis_default_value(),
NUMBER = qgisprocess:::qgis_default_value(),
OUTPUT = qgisprocess:::qgis_default_value(),
...,
.complete_output = .complete_output_option(),
.quiet = .quiet_option(),
.messages = .message_option()
)source - Input layer. Path to a vector layer.
enum of ("Number of features", "Percentage of features") - Method. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
number - Number/percentage of features. A numeric value. field:FIELD_NAME to use a data defined value taken from the FIELD_NAME field. expression:SOME EXPRESSION to use a data defined value calculated using a custom QGIS expression.
sink - Extracted (random). Path for new vector layer.
further parameters passed to qgisprocess::qgis_run_algorithm()
logical specifying if complete out of qgisprocess::qgis_run_algorithm() should be used (TRUE) or first output (most likely the main) should read (FALSE). Default value is TRUE.
logical specifying if parameter .quiet for qgisprocess::qgis_run_algorithm() Default value is TRUE.
logical specifying if messages from qgisprocess::qgis_run_algorithm() should be printed (TRUE) or not (FALSE). Default value is FALSE.