Get maxindex (length of boolean vector) and poslength (number of 'selected' elements)
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).
## 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, ...)
x |
an R object, typically a |
... |
further arguments (ignored) |
an integer scalar
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
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))
})Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.