[英]Finding value pairs that occur more than once in a data.table in R
I have a data.table
in R
我在
R
有一个data.table
> head(d)
COUNT SAMPLE junction
1: 1 R1 tup
2: 1 R1 tup
3: 1 R1 tai
4: 1 R2 milt
5: 2 R3 Bsg25D
6: 1 R4 tutl
with dimension 与维度
> dim(d)
[1] 1685992 3
Now I want to find out the pairs (SAMPLE, junction) that occur more than once in the data table. 现在我想找出在数据表中出现多次的对(SAMPLE,junction)。 For example, the pair (R1,tup) occures more than once
例如,对(R1,tup)发生不止一次
You can try 你可以试试
library(data.table)
d[,.N>1 ,list(SAMPLE, junction)]
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