\name{sdf.subset} \alias{sdf.subset} \title{Subset a SDF and return SDF segements for selected compounds} \description{ 'sdf.subset' will take a descriptor database generated by 'cmp.parse' and an array of indecies, and return an SDF string consisting of SDFs for compounds corresponding to that list of indecies. The returned value is a character string. } \usage{ sdf.subset(db, cmps) } %- maybe also 'usage' for other objects documented here. \arguments{ \item{db}{The database generated by 'cmp.parse'} \item{cmps}{An array of indecies that correspond to a set of selected compounds from the database} } \details{ 'sdf.subset' depends on information embedded in the descriptor database returned by 'cmp.parse'. It also relies on the availability of the original SDF where the database has been generated from. Basically, when 'cmp.parse' parses the original SDF file, it will store the path of that SDF file as well as offset information for SDF segment in that file. Therefore, if the SDF file has been changed or deleted, 'sdf.subset' cannot function properly. The result SDF will also have names added to compounds if they are not present in the original SDF. } \value{ Return a character string whose content is the concatenation of SDFs for the selected compounds. } \seealso{\code{\link{cmp.parse}}, \code{\link{sdf.visualize}}} \examples{ # load sample database from web db <- cmp.parse("http://bioweb.ucr.edu/ChemMineV2/static/example_db.sdf") # select SDF for 1st and 2nd compound in that SDF sdf_segments <- sdf.subset(db, c(1, 2)) # now sdf_segments containt the 2 SDFs for those 2 compounds } \keyword{utilities}