| Source-class {tm} | R Documentation |
A (virtual) class representing a source, e.g., a directory, a connection, et cetera.
Objects can be created by deriving and instantiating subclasses.
DefaultReader:function
describing a default reader.Encoding:character holding the
encoding of the texts delivered by the source.Length:numeric denoting the
number of the elements delivered by the source. If the number
cannot be determined in advance it should be set to zero.LoDSupport:logical indicating
whether this source supports load on demand.Position:numeric indicating
the position in the source.Vectorized:logical indicating
the ability for parallel element access.Ingo Feinerer
stepNext, getElem, eoi for
sequential element access, and pGetElem for parallel
element access.
getSources to list available sources.