Hi! Try subset(dataframe, is.na(y))
or df[is.na(df$y),] HTH, Ivan Le 1/25/2011 08:07, typhoong a écrit :
hi i have the following dataframe x y 1 345 6 NA 8 123 32 123 12 NA 6 124 7 NA and i want to extract the data rows which contains "NA" data, I tried subset(dataframe,y=="NA") but fail. if you know the answers, please let me know thanks. typhoong
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