Watersheds (version 1.1)

SpDF_Subset: Subsetting spatial dataframe objects

Description

Given and list x of logical values, the function subsets the object z accordingly the TRUE values of x.

Usage

SpDF_Subset(x, y)

Arguments

x

A list of logical values where TRUE values indicates the index of the subset.

y

A spatial object as is defined in package sp from extracting the subset.

Value

A spatial object of the same class of y.

Examples

library(Watersheds)
data(WatershedsData)

# subsetting the river Werra subbasin
id = list(gIntersects(WatershedsData$rWerra, WatershedsData$subbasin,byid=TRUE))
subbasin_rWerra = SpDF_Subset(id,WatershedsData$subbasin)
plot(subbasin_rWerra)

# subsetting the river Werra zhyd watersheds
id = list(gIntersects(WatershedsData$rWerra, WatershedsData$zhyd,byid=TRUE))
zhyd_rWerra = SpDF_Subset(id,WatershedsData$zhyd)
plot(WatershedsData$rWerra,col="blue",lwd=1,add=TRUE)
plot(zhyd_rWerra,col="green3",add=TRUE)
title("Subbasin River Weser and primary zhyd watersheds")

# subsetting the river Werra river drainage watersheds
id = list(gIntersects(subbasin_rWerra, WatershedsData$river,byid=TRUE))
river_rWerra = SpDF_Subset(id,WatershedsData$river)
plot(subbasin_rWerra)
plot(WatershedsData$rWerra,col="blue",lwd=3,add=TRUE)
plot(river_rWerra,col="blue1",add=TRUE)
title("Subbasin River Weser and drainage network")