maxindex.default {bit}R Documentation

Get maxindex (length of boolean vector) and poslength (number of 'selected' elements)

Description

For is.booltype() objects the term length() is ambiguous. For example the length of which() corresponds to the sum of logical(). The generic maxindex gives length(logical) for all booltype()s. The generic poslength gives the number of positively selected elements, i.e. sum(logical) for all booltype()s (and gives NA if NAs are present).

Usage

## Default S3 method:
maxindex(x, ...)

## Default S3 method:
poslength(x, ...)

## S3 method for class 'logical'
maxindex(x, ...)

## S3 method for class 'logical'
poslength(x, ...)

## S3 method for class 'bit'
maxindex(x, ...)

## S3 method for class 'bit'
poslength(x, ...)

## S3 method for class 'bitwhich'
maxindex(x, ...)

## S3 method for class 'bitwhich'
poslength(x, ...)

## S3 method for class 'which'
maxindex(x, ...)

## S3 method for class 'which'
poslength(x, ...)

## S3 method for class 'ri'
maxindex(x, ...)

## S3 method for class 'ri'
poslength(x, ...)

maxindex(x, ...)

poslength(x, ...)

Arguments

x

an R object, typically a is.booltype() object.

...

further arguments (ignored)

Value

an integer scalar

Methods (by class)

Functions

Examples

r <- ri(1, 2, 12)
i <- as.which(r)
w <- as.bitwhich(r)
b <- as.bit(r)
l <- as.logical(r)
u <- which(l)      # unclassed which

sapply(list(r=r, u=u, i=i, w=w, b=b, l=l), function(x) {
  c(length=length(x), sum=sum(x), maxindex=maxindex(x), poslength=poslength(x))
})

[Package bit version 4.6.0 Index]