Summary methods for ff objects
## S3 method for class 'ff' all(x, ..., na.rm = FALSE, range = NULL)
x
a ff object
ff
...
optional other (ff) objects
na.rm
should NA be removed?
NA
range
a ri or an integer vector of length==2 giving a range restriction for chunked processing
ri
integer
length==2
TRUE, FALSE or NA
TRUE
FALSE