Linear Detector Array
Build secr ‘traps’ object, positioning detectors along a
predefined set of lines. make.line is in the same family as
secr functions make.grid etc.
make.line(SLDF, n = 10, startbuffer = 0, by = 20, endbuffer = 0, cluster
= NULL,
type = c("fixedstart", "randomstart", "centred"), detector = "multi")SLDF |
linearmask object or SpatialLinesDataFrame from sp |
n |
maximum number of detectors (or clusters of detectors) per line |
startbuffer |
distance of first detector from start of line(s) |
endbuffer |
minimum distance of last detector from end of line(s) |
by |
spacing between detectors (or clusters of detectors) (m) |
cluster |
numeric vector of within-cluster positions (m from start) |
type |
character |
detector |
character value for detector type - "single", "multi" etc. |
Detectors are placed independently on each line.
An object of class traps comprising a data frame of x- and
y-coordinates, the detector type ("single", "multi", or "proximity" etc.),
and possibly other attributes. The SpatialLinesDataFrame is retained as
attribute ‘SLDF’.
x <- seq(0, 4*pi, length = 200) xy <- data.frame(x = x*100, y = sin(x)*300) mask <- read.linearmask(data = xy, spacing = 20) trps <- make.line(mask, n = 15, startbuffer = 1000, by = 50) plot(mask) plot(trps, add = TRUE)
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