samples <- c(
"TCGA-A7-A13E-11A-61R-A12O-13",
"TCGA-A7-A13F-11A-42R-A12O-13",
"TCGA-A7-A13G-11A-51R-A13P-13",
"TCGA-A7-A13E-01A-11R-A27D-13",
"TCGA-A7-A45U-01A-11R-A12O-13",
"TCGA-A7-A13G-01A-11R-A13P-13"
)
我的目的是匹配字符的前12位,找到前12位相同的字符串对,且保留该字符串对,如果未找到则删除字符串。比如,第一个字符串:"TCGA-A7-A13E-11A-61R-A12O-13"和第四个字符串"TCGA-A7-A13E-01A-11R-A27D-13"满足条件,则保留;而第二个字符串"TCGA-A7-A13F-11A-42R-A12O-13"没能匹配出与之对应的字符串,所以删除。依此类推。最后我期待得到的字符串向量为:
samples <- c(
"TCGA-A7-A13E-11A-61R-A12O-13", , "TCGA-A7-A13G-11A-51R-A13P-13", "TCGA-A7-A13E-01A-11R-A27D-13", , "TCGA-A7-A13G-01A-11R-A13P-13"
)
请求大牛给与指导,谢谢!