thanks for help

I have a data.frame with 121 rows. I wish to split random in two data.frames
(first = 80 rows and second = 41 rows). I try this code

dat1 <- AnalysisDF_clean[sample(1:nrow(AnalysisDF_clean),
80,replace=FALSE),]
dat2 <- AnalysisDF_clean[sample(1:nrow(AnalysisDF_clean),
41,replace=FALSE),]

but I have a problem because in dat2 sometimes there are some value present
in dat1.

thanks

Gianni

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