bit (version 4.0.5)

maxindex.default: 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 booltypes. The generic poslength gives the number of positively selected elements, i.e. sum(logical) for all booltypes (and gives NA if NAs are present).

Usage

# S3 method for default
maxindex(x, ...)
# S3 method for default
poslength(x, ...)
# S3 method for logical
maxindex(x, ...)
# S3 method for logical
poslength(x, ...)
# S3 method for bit
maxindex(x, ...)
# S3 method for bit
poslength(x, ...)
# S3 method for bitwhich
maxindex(x, ...)
# S3 method for bitwhich
poslength(x, ...)
# S3 method for which
maxindex(x, ...)
# S3 method for which
poslength(x, ...)
# S3 method for ri
maxindex(x, ...)
# S3 method for ri
poslength(x, ...)
maxindex(x, ...)
poslength(x, ...)

Value

an integer scalar

Arguments

x

an R object, typically a is.booltype object.

...

further arguments (ignored)

Methods (by class)

• default: default method for maxindex

• default: default method for poslength

• logical: maxindex method for class logical

• logical: poslength method for class logical

• bit: maxindex method for class bit

• bit: poslength method for class bit

• bitwhich: maxindex method for class bitwhich

• bitwhich: poslength method for class bitwhich

• which: maxindex method for class which

• which: poslength method for class which

• ri: maxindex method for class ri

• ri: poslength method for class ri

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))
})