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Dear ?, I'm sure that there are many ways to do what you want; here's one: > cbind(concept_df, category= + ifelse(apply( + sapply(chemical_df$chemical, + function(x) grepl(x, concept_df$concept)), + 1, any), + "chemical", "")) concept category 1 butan

I have two data frame. I want to use "chemical_df" to match "concept_df " concept_df <- data.frame(concept=c("butan acid ", "nano diamond particl", "slurri composit", "composit ph polis", " inorgan particl ", "grind liquid", "liquid formul", "nanoparticl", "size abras particl",

...s see a noobs'' walkthrough like: (1) create an empty project directory (2) build standard directory tree (3) clone in standard Rakefile (4) get started speccing. (2) and (3) are my problem. Thanks much! ----- Bill Tozier AIM:vaguery at mac.com ? Twitter:Vaguery http://williamtozier.com/slurry "The brotherhood of man is not a mere poet''s dream; it is a most depressing and humiliating reality." -- Oscar Wilde

Hello all, I've set up a live mp3 stream for our non-commercial radio station, and just recently I've received a slurry of complaints from folks using Windows Media Player. Most of the complaints vary, but seem to be consistent regarding long buffer time, odd drop outs, long reconnect times, etc. Normally, I refer folks to one of the infinitely better players out there, but now the issue seems to be "but I...

Try the stringr package. This should work chemical=c("basic", "alkalin", "alkali", "acid", " ph ", "hss") chemical_match <- str_c(chemical, collapse = "|") chemical_match concept_df$match[str_detect(concept_df$concept, chemical_match)] <- "chemical" concept_df > concept_df concept match