我有一个如下所示的数据库。
pos1<-c(5,15,25,40,80,5,18,22,38,84,5,16,50,92,31,50,20,30,50,70,27,50,60,50,90,20,40)
pos2<-c(10,17,30,42,90,10,20,24,42,87,10,19,52,100,40,70,25,32,60,90,30,60,71,60,100,25,50)
chr<-c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2)
n<-c(25,65,78,56,35,78,58,98,14,2