indexing data.frames
graham lawrence wrote:
Dear R-help, I have a series of data.frames (i1,i2,...,in) all containing the same number of items, but dissimilar content. I would like to instal them in another data.frame, say index, so that I can access their items with index[i,j]. No matter how I try to set index up, its subframes cannot be indexed, because they all have the row number of 1. What am I doing wrong? (I get the same result with lists, a data.frame of lists, or a list of data.frames) Alternatively, does R contain an equivalent to the INDIRECT function found in spreadsheets, so that instead of doing, say, edit(i6), I could get instead edit(the vector named by the content of i6)?
I'm not quite sure if I understand your question correctly. Here an example for indexing data.frames in a list: x <- data.frame(a1=1:10, b1=2:11) y <- data.frame(a2=11:20, b2=12:21) L <- list(x=x, y=y) L # two data.frames in a list. L[[1]][[1]][1] # first list element, first col, first item L[[1]][[2]][3] # first list element, second col, third item L[[2]][[2]][10] # second list element, second col, last item Uwe Ligges -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._