bit (version 4.6.0)

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 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

# 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)

• maxindex(default): default method for maxindex

• maxindex(logical): maxindex method for class logical()

• maxindex(bit): maxindex method for class bit()

• maxindex(bitwhich): maxindex method for class bitwhich()

• maxindex(which): maxindex method for class which()

• maxindex(ri): maxindex method for class ri()

Functions

• poslength(default): default method for poslength

• poslength(logical): poslength method for class logical()

• poslength(bit): poslength method for class bit()

• poslength(bitwhich): poslength method for class bitwhich()

• poslength(which): poslength method for class which()

• poslength(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))
})