[ 源代码： r-cran-g.data ]
软件包：r-cran-g.data（2.4.1-1）
GNU R package for delayed-data
g.data creates and maintains delayed-data packages (DDP's). Data stored in a DDP are available on demand, but do not take up memory until requested. You attach a DDP with g.data.attach(), then read from it and assign to it in a manner similar to S-Plus, except that you must run g.data.save() to actually commit to disk.