Hello

I am trying to resample from this data set (see below). The function I am using so far is doing it by considering A and B columns as linked. I used this function.

>NUCh_rep<-replicate(500,data[sample(1:nrow(data),replace=T),],simplify=F)

What I need is to resample (500 times) with replacement but considering A and B columns UNLINKED. Any advice it is most appreciated. Thanks.

             A           B
5          257       259
10         257       259
10.1       257       259
4          257       259
9          257       259
2          257       259
8          257       259
1          257       259
8.1        257       259
8.2        257       259
7          255       257


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