Hi, there: I think one possible solution from me is
for each of b2, I calculate the combinations using combn; then collapse to calculate by using unlist and table. For example, b2[[1]] can give ab, ac, bc, abc,... b2[[[2]] can give ab, ac, bc, abc ... then unlist then table to calculate the freq. Best, Weiwei On 10/18/07, Nordlund, Dan (DSHS/RDA) <[EMAIL PROTECTED]> wrote: > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Weiwei Shi > > Sent: Thursday, October 18, 2007 3:32 PM > > To: jim holtman > > Cc: [EMAIL PROTECTED] > > Subject: Re: [R] alignment algorithm or pattern frequency calculation > > > > for example, > > > > a,b: 3 which means a and b appear together 3 times in my input list. > > > > On 10/18/07, jim holtman <[EMAIL PROTECTED]> wrote: > > > It would be helpful if you explained what the numbers mean. > > > > > > On 10/18/07, Weiwei Shi <[EMAIL PROTECTED]> wrote: > > > > Hi, > > > > > > > > I am looking for an algorithm (better if it is > > implemented in R) which > > > > can do the following: > > > > > > > > from the following list: > > > > a,b,c,d > > > > a,b,c > > > > b,c > > > > a,b,c,d,e > > > > > > > > to calculate > > > > a,b,c,d: 2 > > > > a,b,c: 3 > > > > a,b: 3 > > > > a,c: 3 > > > > b,c: 4 > > > > b,c,d:2 > > > > > > > > here, the order is not important. > > > > > > > > Thanks. > > > > > > I guess I have more questions than answers. > 1. What are the rules for deciding on which patterns to search for? You > don't list c,d or c,d,e, or single character patterns. > 2. Are these patterns stored in comma separated strings or as character > vectors or...? > > Dan > > Daniel J. Nordlund > Research and Data Analysis > Washington State Department of Social and Health Services > Olympia, WA 98504-5204 > > > > -- Weiwei Shi, Ph.D Research Scientist GeneGO, Inc. "Did you always know?" "No, I did not. But I believed..." ---Matrix III [[alternative HTML version deleted]] ______________________________________________ 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.
