ff (version 4.0.2)

length.hi: Hybrid Index, querying

Description

Functions to query some index attributes

Usage

# S3 method for hi
length(x)
# S3 method for hi
maxindex(x, …)
# S3 method for hi
poslength(x, …)

Arguments

x

an object of class hi

…

further arguments (not used)

Value

an integer scalar

Details

length.hi returns the number of the subsript elements in the index (even if they are negative). By contrast poslength returns the number of selected elements (which for negative indices is maxindex(x) - length(unique(x))). maxindex returns the highest possible index position.

See Also

hi, as.hi, length.ff, length, poslength, maxindex

Examples

# NOT RUN {
  length(as.hi(-1, maxindex=12))
  poslength(as.hi(-1, maxindex=12))
  maxindex(as.hi(-1, maxindex=12))
  message("note that")
  length(as.hi(c(-1, -1), maxindex=12))
  length(as.hi(c(1,1), maxindex=12))
# }