addline: Function to add lines to landscape
Description
adds a line from x1 to x2 to a raster layer
Usage
addline(r, x1, x2, val, plot = FALSE)
Value
returns modified raster layer
Arguments
- r
raster that represents the landscape
- x1
from coordinates
- x2
to coordinates
- val
resistance value 1 is no resistance
- plot
switch if landscape should be plotted