Dear Reserchers,

sorry if I post here this help request but it's part of Remote Sensing
Analysis. I have a huge df where I need to select and extarct the row with
the same value. Following a small example:


mydata <-
data.frame(ID=c(1,2,3,4,5,6),V=c(1,2,3,4,4,6),B=c(10,20,30,40,40,60))

 ID V  B
1  1 1 10
2  2 2 20
3  3 3 30
4  4 4 40
5  5 4 40
6  6 6 60


myExtract.data
ID V B
4  4 40
5  4 40


because in V and B there are the same value

thanks in advance

Gianni

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