randomPoints: Randomly selected points in good habitat.

In mikemeredith/makeJAGSmask: Construct a Habitat Matrix for Use with SECR Analysis in JAGS or BUGS

Description

Generates the coordinates of randomly selected points in good habitat. This can be used to generate starting values for JAGS analysis.

Usage

randomPoints(n, JAGSmask, fixed)

Arguments

n	The number of random points required.
JAGSmask	An object of class JAGSmask which specifies the good habitat.
fixed	A 2-column matrix or data frame with fixed locations, which will be included unchanged at the top of the output matrix (if nrows(fixed) < n). Any rows in fixed with NAs will be replaced with random values. A warning is given if any locations in fixed are in bad habitat.

Value

An n x 2 matrix with the coordinates of points in suitable habitat on the scale of habMat.

Author(s)

Mike Meredith

Examples

data(simSCR)
plot(simSCR$JAGSmask)

# Create a few locations in good habitat:
( locs <- randomPoints(3, simSCR$JAGSmask) )
points(locs, pch=16)

# Treat these as fixed locations in a set of 10:
( rand <- randomPoints(10, simSCR$JAGSmask, fixed=locs) )
points(rand, pch=16, col='blue')
# Change one of the 'locs' to bad habitat
locs[2, ] <- c(2, 24)
randomPoints(10, simSCR$JAGSmask, fixed=locs) # Gives a warning.

mikemeredith/makeJAGSmask documentation built on May 19, 2021, 1:10 a.m.