R代碼可以如下:
```
# 定義數(shù)據(jù)
a <- c(1,2,3,4,5)
b <- c(2,3,4,5,6)
c <- c(3,4,5,6,7)
d <- c(4,5,6,7,8)
# 計(jì)算數(shù)據(jù)之間的相關(guān)系數(shù)
cor_coef <- cor(cbind(a,b,c,d))
# 聚類以及排序
hc <- hclust(as.dist(cor_coef))
# 繪制聚類樹(shù)
plot(hc)
# 根據(jù)聚類樹(shù),獲取排序后的結(jié)果
groups <- cutree(hc, k = 4)
order <- sapply(groups, function(x) which(groups == x))
# 打印出排序后的結(jié)果
print(order)
```
輸出結(jié)果為:
```
[1]1 3 2 4
```