Hi,
   To pretty print aggregates by various dimensions I needed to add a
empty row in output of aggregate.
 
    For example.
 
 d<-(aggregate(data[,cbind("x")], by=list(data$group1,data$group2),
sum))
 
          Group.1 Group.2          x
1 A                   N         3
2 A                   Y        2
3 B                   N         420164905    
 
Is there a way to add an empty row between group1 and group 2.
So that it looks like
          Group.1 Group.2          x
1 A                   N                 3
2 A                   Y                 2
3
4 B                   N         420164905    
 
 
I need to format a series of aggregates by multi dimensions and I wanted
to break the data by empty row between group 1 that people can see some
space.
 
Also is there a way to add subtotals by group 1 into the mix :
          Group.1 Group.2          x
1 A                   N               3 
2 A                   Y                2
3                                         5
4 B                   N         420164905   
5                                  420164905  
 
 
original data is something like:
data
Group1 Group2      x
A        Y                1 
B        N                1
A        Y                1            
B        N           420164904   
A        N               3

 
thanks
Dhruv

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