On Sat, Jun 19, 2010 at 4:56 AM, Johannes Huesing <johan...@huesing.name> wrote: > A rule would be a data structure containing the ID of the rule, the > rule in human readable language, an expression evaluating variables > within the environment of the appropriate data frame (and resolving to > a logical vector), possibly the data frame itself, and the query > message (possibly as an sprintf expression). The data structure may be > an S4 object or a list. In our current workflow, we manage the > validation rules using a spreadsheet, and import them into a > competitor's analysis software. > > I could pass > > function(df) with(df, (vsstresn < 30 | vsstresn > 130) & vstestcd == "HR")
Another possibility would be to use an sql statement or fragment so if you passed this sql fragment: > fragment <- "(vsstresn < 30 or vsstresn > 130) and vstestcd = 'HR'" > > # then your program would run this code: > > df <- data.frame(vsstresn = seq(10, 200, 10), vstestcd = rep(c("HR", "RH"), > c(16, 4))) > library(sqldf) > sqldf(paste("select * from df where", fragment)) vsstresn vstestcd 1 10 HR 2 20 HR 3 140 HR 4 150 HR 5 160 HR ______________________________________________ R-help@r-project.org mailing list 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.