View source: R/upstream_downstream.R
upstream | R Documentation |
Function returns the river network consisting of all upstream segments from the specified river segment.
upstream(HSnetwork, ID, riverID = "riverID")
HSnetwork |
a |
ID |
The ID of the segment for which the upstream river network is returned. |
riverID |
A character string which specifies the name of the column in
|
The input HSnetwork
object consisting of only upstream
segments.
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