Hello, I have two data frames structured as follows:
df1 v1 v2 1 83 1 83 1 84 1 84 1 85 1 85 2 90 2 91 2 91 2 91 2 92 4 89 4 89 4 90 4 90 df2 v1 v2 1 83 2 83 3 83 4 83 1 84 2 84 3 84 4 84 ... etc. I am trying to create an indicator variable in df2 to indicate whether the record is identified in df1. I just want to know if it appears once. The problem seems to be that df1 contains multiple records with the same data. I am attempting the following: df2$v3 <- ifelse(df2$v1 %in% df1$v1 & df2$v2==df2$v1, 1, 0). However, I get the following warning message: Warning message: In df2$v2 == df1$v1 : longer object length is not a multiple of shorter object length Nonetheless, the function outputs all 0's to df2$v3. If anybody has any suggestions with this, I would greatly appreciate it. Thanks, - Nick Pretnar npret...@gmail.com ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
