| subset.traps {secr} | R Documentation |
Retain selected rows of a traps object.
## S3 method for class 'traps': subset(x, subset, ...) ## S3 method for class 'traps': split(x, f, drop = FALSE, prefix = 'S', ...)
x |
traps object |
subset |
vector to subscript the rows of x |
... |
arguments passed to other functions |
f |
factor or object that may be coerced to a factor |
drop |
logical indicating if levels that do not occur should be dropped (if f is a factor) |
prefix |
a character prefix to be used for component names when values of f are numeric |
The subscripts in subset may be of type integer, character or
logical as described in Extract.
split generates a list in which each component is a
traps object. Each component corresponds to a level of
f. The argument 'x' of split cannot be a list.
An object of class traps with only the requested subset of rows.
Subsetting is applied to usage and covariates attributes
if these are present.
Murray Efford murray.efford@otago.ac.nz
## odd-numbered traps only, using modulo operator temptrap <- make.grid(nx = 7, ny = 7) t2 <- subset(temptrap, as.logical(1:nrow(temptrap) %% 2)) plot(t2)