mvl_group_lapply {RMVL} | R Documentation |
Iteratively call function fn(idx)
over index stretches previously computed with mvl_group
mvl_group_lapply(G, fn)
G |
a list of groups and group stretches produced by |
fn |
a function of one argument - list of indices |
a list of results of function fn
## Not run: Mtmp<-mvl_open("tmp_a.mvl", append=TRUE, create=TRUE) mvl_write_object(Mtmp, data.frame(x=rep(c("a", "b"), 50), y=(1:100)/5), "df1") Mtmp<-mvl_remap(Mtmp) df1<-Mtmp$df1 G<-mvl_group(list(df1[,"x",ref=TRUE], df1[,"y", ref=TRUE])) mvl_group_lapply(G, function(idx) { return(sum(df1[idx, "y"]))}) ## End(Not run)