## S3 method for class 'mask':
head(x, n=6L, ...)
## S3 method for class 'Dsurface':
head(x, n=6L, ...)
## S3 method for class 'traps':
head(x, n=6L, ...)
## S3 method for class 'capthist':
head(x, n=6L, ...)
## S3 method for class 'mask':
tail(x, n=6L, ...)
## S3 method for class 'Dsurface':
tail(x, n=6L, ...)
## S3 method for class 'traps':
tail(x, n=6L, ...)
## S3 method for class 'capthist':
tail(x, n=6L, ...)
subset
head
, tail