QGIS Algorithm provided by QGIS (native c++) Extract M values (native:extractmvalues). Extracts m values (or m value statistics) from geometries into feature attributes. Extracts m values from geometries into feature attributes. By default only the m value from the first vertex of each feature is extracted, however the algorithm can optionally calculate statistics on all of the geometry's m values, including sums, means, and minimums and maximums
qgis_extractmvalues(
INPUT = qgisprocess:::qgis_default_value(),
SUMMARIES = qgisprocess:::qgis_default_value(),
COLUMN_PREFIX = 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 ("First", "Last", "Count", "Sum", "Mean", "Median", "St dev (pop)", "Minimum", "Maximum", "Range", "Minority", "Majority", "Variety", "Q1", "Q3", "IQR") - Summaries to calculate. Number of selected option, e.g. '1'. Comma separated list of options, e.g. '1,3'.
string - Output column prefix. String 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. 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.