Hello all , 
I have a data frame like this 

X1X2X3
11815
22916
331017
441118
551219
661320
771421

now i want to randomly reorder the variable X2  but the row element should be 
same 
as for example 

X1X2X3
12916
251219
331017
471421
561320
61815
741118

how can i do that ??

Hint : 
this could be helpful : 

if X2 is only a vector like this 
X2<-c(8,9,10,11,12,13,14)

so i can easily reorder it by using sample commend 
sample (X2 , size=length(X2), replace=FALSE)
 
may be i have to use lapply commend with sample commend .


/.......Tanvir Ahamed

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