我有一个数据集，其中两列包含互惠的值。也就是说，如果您可以翻转行中的某些值，则只有其中一行的行相同。我想知道是否有办法过滤这些行，只保留一行。
ds <- structure(list(gene_a = c("CACNA2D4", "CTNND2", "GCN1L1", "ROBO2",
"MLL2", "ZNF521", "ITPR3", "STAB1", "DSP", "ZNF676", "LAMC1",
"NLRP2", "PCDHGA10", "PRDM16", "PTPRB", "PXDN", "CTNND2", "FBN3",
"KIF20B", "MYOF"), gene_a_freq = c(0.0303030303030303, 0.0303030303030303,
0.0656565656565657, 0.0454545454545455, 0.0555555555555556, 0.0353535353535354,
0.0404040404040404, 0.0353535353535354, 0.0303030303030303, 0.0353535353535354,
0.0303030303030303, 0.0404040404040404, 0.0303030303030303, 0.0303030303030303,
0.0303030303030303, 0.0303030303030303, 0.0303030303030303, 0.0353535353535354,
0.0303030303030303, 0.0353535353535354), gene_b = c("CTNND2",
"CACNA2D4", "ROBO2", "GCN1L1", "ZNF521", "MLL2", "STAB1", "ITPR3",
"ZNF676", "DSP", "PTPRB", "PRDM16", "PXDN", "NLRP2", "LAMC1",
"PCDHGA10", "FBN3", "CTNND2", "MYOF", "KIF20B"), gene_b_freq = c(0.0303030303030303,
0.0303030303030303, 0.0454545454545455, 0.0656565656565657, 0.0353535353535354,
0.0555555555555556, 0.0353535353535354, 0.0404040404040404, 0.0353535353535354,
0.0303030303030303, 0.0303030303030303, 0.0303030303030303, 0.0303030303030303,
0.0404040404040404, 0.0303030303030303, 0.0303030303030303, 0.0353535353535354,
0.0303030303030303, 0.0353535353535354, 0.0303030303030303)), .Names = c("gene_a",
"gene_a_freq", "gene_b", "gene_b_freq"), row.names = c(NA, 20L
), class = "data.frame")
例如下面的第2行，如果您将gene_a与gene_b和gene_a_freq与gene_b_freq交换，则第2行将与第1行相同。总是在相邻的行中。我希望能够只保留其中一个，所以在这个例子中，第2行保留第1行。
gene_a gene_a_freq gene_b gene_b_freq
1 CACNA2D4 0.03030303 CTNND2 0.03030303
2 CTNND2 0.03030303 CACNA2D4 0.03030303
3 GCN1L1 0.06565657 ROBO2 0.04545455
4 ROBO2 0.04545455 GCN1L1 0.06565657
5 MLL2 0.05555556 ZNF521 0.03535354
6 ZNF521 0.03535354 MLL2 0.05555556
7 ITPR3 0.04040404 STAB1 0.03535354
8 STAB1 0.03535354 ITPR3 0.04040404
9 DSP 0.03030303 ZNF676 0.03535354
10 ZNF676 0.03535354 DSP 0.03030303
11 LAMC1 0.03030303 PTPRB 0.03030303
12 NLRP2 0.04040404 PRDM16 0.03030303
13 PCDHGA10 0.03030303 PXDN 0.03030303
14 PRDM16 0.03030303 NLRP2 0.04040404
15 PTPRB 0.03030303 LAMC1 0.03030303
16 PXDN 0.03030303 PCDHGA10 0.03030303
17 CTNND2 0.03030303 FBN3 0.03535354
18 FBN3 0.03535354 CTNND2 0.03030303
19 KIF20B 0.03030303 MYOF 0.03535354
20 MYOF 0.03535354 KIF20B 0.03030303
由于