# # # R代码从装饰图案的RbcBook1来源。Rnw“# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #代码块1号:RbcBook1。Rnw: 45-48 # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #库(图)库(RbcBook1)缓存(bigran < - randomGraph(粘贴(“a”, 1:50), 1:30,。4))