View source: R/apps_of_riverdistance.R
riverdistancemat | R Documentation |
Returns a matrix of distances between every point and every other point of given river locations (segment and vertex), or of a subset.
riverdistancemat(
seg,
vert,
rivers,
logical = NULL,
ID = NULL,
stopiferror = TRUE,
algorithm = NULL
)
seg |
A vector of river locations (segment component). |
vert |
A vector of river locations (vertex component). |
rivers |
The river network object to use. |
logical |
A boolean vector that can be used for subsetting. If used,
|
ID |
a vector of observation IDs for aid in interpreting the output table |
stopiferror |
Whether or not to exit with an error if a route cannot be
found. If this is set to |
algorithm |
Which route detection algorithm to use ( |
A matrix of distances (numeric) with rows and columns labeled by corresponding values of ID
.
Building routes from the river mouth to each river network segment and/or distance lookup tables will greatly reduce computation time (see buildsegroutes).
Matt Tyers
riverdistance
data(Gulk, fakefish)
logi1 <- (fakefish$flight.date==as.Date("2015-11-25"))
riverdistancemat(seg=fakefish$seg, vert=fakefish$vert, rivers=Gulk, logical=logi1)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.