| airdist {spdep} | R Documentation |
Measure distance from plot
Description
Measure a distance between two points on a plot using locator; the function checks par("plt") and par("usr") to try to ensure that the aspect ratio y/x is 1, that is that the units of measurement in both x and y are equivalent.
Usage
airdist(ann=FALSE)
Arguments
ann |
annotate the plot with line measured and distance |
Value
a list with members:
dist |
distance measured |
coords |
coordinates between which distance is measured |
Author(s)
Roger Bivand Roger.Bivand@nhh.no
See Also
[Package spdep version 1.3-5 Index]