try this: > my.list <- c(7,12,3) # set of matching numbers > set.seed(1) > result <- character(40) # create empty vector > # create some comma separated data > for(i in 1:40) result[i] <- paste(sample(1:20,6), collapse=',') > # just leave it as a character vector for testing == you can convert your data frame > str(result) chr [1:40] "6,8,11,16,4,14" "19,13,12,2,4,3" "14,8,20,9,12,15" "8,15,17,4,11,2" ... > # find matching entries > matches <- sapply(result, function(x){ + .comma <- strsplit(x, ',')[[1]] # get the fields + any(my.list %in% .comma) + }) > # print matching entries > result[matches] [1] "19,13,12,2,4,3" "14,8,20,9,12,15" "6,8,1,7,14,20" "10,12,9,4,14,11" "16,3,14,7,18,10" [6] "2,20,6,9,11,7" "7,20,9,16,14,6" "16,19,8,13,7,5" "16,4,13,3,19,17" "5,2,12,15,13,18" [11] "6,19,12,4,3,8" "19,12,18,13,6,7" "3,1,13,2,8,10" "20,10,9,3,13,7" "13,11,6,8,9,3" [16] "15,7,12,20,14,6" "8,18,12,13,10,14" "6,4,16,9,15,3" "16,14,17,10,12,6" "3,18,6,11,2,13" [21] "7,15,5,4,9,18" "4,10,11,3,5,18" "13,19,18,6,5,3" "7,10,17,9,5,1" "9,17,7,3,6,10" [26] "8,14,13,10,7,16" >
On 2/19/07, Johannes Graumann <[EMAIL PROTECTED]> wrote: > > On Monday 19 February 2007 17:49, jim holtman wrote: > > have you tried 'unlist(strsplit(....))'? The 'unlist' will probably > give > > you more values than you have rows, so it would be good if you could > > explain what it is you are trying to do. > I want to isolate a data frame containing all rows of 'dataframe' which > contain a member of 'list' in the field 'Field', which itself is a comma > separated list of entries. > > Better this (know in brain ...)? > > Joh > > > On 2/19/07, Johannes Graumann <[EMAIL PROTECTED]> wrote: > > > Hello again, > > > > > > I'm trying to do the following: > > > > > > subset(dataframe,list %in% strsplit(dataframe[[Field]],",")) > > > > > > But This returns always the complete dataframe, since the > > > strsplit(dataframe[[Field]],",") is evaluated as one big list for the > > > whole > > > data frame rather than one list per row. How can I have this evaluated > on > > > a > > > per row basis? > > > > > > After 1.5 h hitting head against wall - begging for insights ... > > > > > > Joh > > > > > > ______________________________________________ > > > R-help@stat.math.ethz.ch 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. > > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.