trend.plot: Plot of trends
Description
This function produces a plot of the variable of interest against each of the two geographical coordinates.
Usage
trend.plot(data, var.name, coords, ...)
Arguments
data
an object of class "data.frame" containing the data.
var.name
a formula object indicating the variable to display.
coords
a formula object indicating the geographical coordinates.
...
additional arguments to be passed to plot.