Sample transect

Creates random transects from points and generates sample points along each transect

sampleTransect(x, min.length, max.length, id = NULL, ...)

Arguments

x	A sp point object
min.length	Minimum length of transect(s)
max.length	Maximum length of transect(s)
id	A unique identification column in x
...	Additional arguments passed to sample.line

Note

Function create random direction and length transects and then creates a point sample along each transect. The characteristic of the sample points are defined by arguments passed to the sample.line function

Author

Jeffrey S. Evans <jeffrey_evans@tnc.org>

Examples

library(sp)
data(meuse)
coordinates(meuse) <- ~x+y
proj4string(meuse) <- CRS("+init=epsg:28992")
#> Warning: Discarded datum Amersfoort in Proj4 definition
meuse <- meuse[sample(1:nrow(meuse),10),]

transects <- sampleTransect(meuse, min.length=200, 
                    max.length=500, min.samp = 3)
  plot(transects$transects)
    plot(transects$samples, pch=20, add=TRUE)