read.csv('D:\\ForRename\\data.csv',sep = ',',header = T) %>%
group_by(Area,Trophicgroup) %>% mutate(Md_13C=mean(d13C),Md_15N=mean(d15N),
Sd_13C=sd(d13C),Sd_15N=sd(d15N),
Max_13C=max(d13C),Max_15N=max(d15N),
Min_13C=min(d13C),Min_15N=min(d15N)) %>%
select(Trophicgroup,Md_13C:Min_15N) %>% distinct() %>%
arrange(Area,Trophicgroup) %T>% str->All_sumy