The given data is
给定的数据是
SNP1 <- c("AA","GG","AG")
SNP2 <- c("AA","CC","AC")
SNP3 <- c("GG","AA","AG")
df<- data.frame(SNP1, SNP2, SNP3)
colnames(df)<- c('rs10000438', 'rs10000500','rs1000055')
SNP1 <- c("AA","G
阅读背景：
如何通过levels（）函数将数据帧中的值转换为虚拟值？
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