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等处理碱基序列文件时,如果一整列全为“T”碱基,则R语言默认为逻辑值TRUE,如果读取时,设置colClasses = “character”,则读取结果为字符型“T”
ped<-read.table("combind_ped.ped",colClasses = "character") #读取时,添加colClasses = "character"