R：在相互的范围内匹配向量的分量

我有两个不同的向量，我从中索引了所有可能的完美匹配组合：

starts <- c(54, 54, 18, 20, 22, 22, 33, 33, 33, 37, 42, 44, 44, 51, 11, 17, 19, 19, 19, 19, 22, 23, 23, 24, 24)
ends <- c(22, 14, 14, 14, 14, 14, 14, 14, 14, 24, 24, 25, 25, 25, 25, 26, 26, 29, 30, 31, 32, 33, 33, 33, 33)

which(outer(starts, ends, "=="), arr.ind=TRUE)

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启动您可以通过编写一个小的辅助函数来完成比较：

cmp <- function(x, y, cutoff=5){abs(x-y) <= cutoff}

which(outer(starts, ends, cmp), arr.ind=TRUE)

       row col
  [1,]   3   1
  [2,]   4   1
  [3,]   5   1
  [4,]   6   1
  [5,]  16   1
  [6,]  17   1
  [7,]  18   1
       ... etc.

cmp+1，用于再现代码和样本数据。欢迎来到堆栈溢出。