錯誤讀取數據集

Question

我在讀一本集有問題

我的代碼：

require(igraph) 
g <- graph(c(0, 1, 1, 2, 2, 0, 1, 3, 3, 4, 
       4, 5, 5, 3, 4, 6, 6, 7, 7, 8, 
       8, 6, 9, 10, 10, 11, 11, 9)) 

錯誤：

Error in graph(c(0, 1, 1, 2, 2, 0, 1, 3, 3, 4, 4, 5, 5, 3, 4, 6, 6, 7, : 
    At structure_generators.c:84 : Invalid (negative) vertex id, Invalid vertex id 

Answer 1

的問題似乎是頂點名稱0

yourgraph <- c(0, 1, 1, 2, 2, 0, 1, 3, 3, 4, 
       4, 5, 5, 3, 4, 6, 6, 7, 7, 8, 
       8, 6, 9, 10, 10, 11, 11, 9) 

g <- graph(yourgraph + 1)