Function to Group by Multiple Columns and Nest

General
1

Hi Please note when i use the below example the code doesnot work for the nesting part. It nests by only single variable instead of two variables can you please help.

d_1<-data.frame(v1=c("a","a","a","b","b","b"),
                 v2=c("c","c","c","d","d","d"),
                 M1=c(10,10,10,10,10,10),
                 M2=c(20,20,20,20,20,20),
                 M3=c(30,30,30,30,30,30),
                 M4=c(40,40,40,40,40,40))

group_sum_2<-function(d,group_var)
{
  
  d %>% 
  group_by(!!!syms(group_var),.add=TRUE)%>%
  summarise_if(is.numeric,sum)%>%
  group_nest(!!!syms(group_var),.keep=TRUE) # this line does  not nest by two variables v1 and v2 
  
}

var_2<-c("v1","v2") # in the nesting part the column v2 is not getting added. 

group_sum_2(d_1,var_2)
2

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