secr (version 1.3.0)

subset.traps: Subset traps Object

Description

Retain selected rows of a traps object.

Usage

## S3 method for class 'traps':
subset(x, subset, \dots)
## S3 method for class 'traps':
split(x, f, drop = FALSE, prefix = 'S', \dots)

Arguments

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

Value

• An object of class traps with only the requested subset of rows. Subsetting is applied to usage and covariates attributes if these are present.

Details

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.

See Also

traps, rbind.traps

Examples

## 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)