dd <- c(0.0043814,
0.0022016,
0.0040069,
0.0075254,
0.0106133,
0.0100106,
0.0039648,
0.0112309,
0.0098973,
0.0135935,
0.003797,
0.0081545,
0.0153619,
0.0099711,
0.0092004)
##下面的14和1,不论我修改为9和6,10和5,算出来的均值都一样,并且与实际结果不符
grp <- as.data.frame(c(rep("H",14),rep("D",1)))
names(grp) <- "grp"
dt <- cbind(grp=grp,dtv=dd)
aggregate(.~ggrp$group,data = dtt,mean)
用了R4.1和3.6版本,都是一样的结果,望大佬们告知原因