search for: thiscol

...for the triviality of this question, but I was wondering if anyone could tell me why this function doesn't return the expected output, i.e. a matrix containing two columns from a large data frame called 'finalTable'? Oddly, the statement between the curly brackets works if run with 'thisCol' and 'thatCol' already defined. Any help would be much appreciated. Here's what 'finalTable' looks like, if it helps:- Many thanks, Adam -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-function-tp4630805.html Sent from the R help mailing li...

...2 14 0.9664470 [[2]] [,1] [,2] [,3] [1,] 0 10 0.09678172 [2,] 1 12 0.75177116 [3,] 2 14 0.59927159 [4,] 3 16 0.18472215 [[3]] [,1] [,2] [,3] [1,] 0 10 0.6343689 [2,] 1 12 0.8121039 Given such a list I would like to create a matrix: 0 10 mean(ThisCol for this row) 1 12 mean(ThisCol for this row) 2 14 mean(ThisCol for this row) 3 16 mean(ThisCol for this row) I can loop using a for loop but I would like to use apply but I have no idea how to get it to work. If I could pass arguments by reference to a function it would be easy but as far as I c...

How to optimize the for-loop to be reasonably fast for sample.size=100000000 ? You may want to change sample.size=1000 to have an idea what I am achieving. set.seed(143) A <- matrix(sample(0:1, sample.size, TRUE), ncol=10, dimnames=list(NULL, LETTERS[1:10])) B <- list() for(i in 1:10) { B[[i]] <- apply(combn(LETTERS[1:10], i), 2, function(x) { sum(apply(data.frame(A[,x]), 1,

Hi I have two basic questions, and here they go, but I was wondering as well where can I ask these basic questions without bothering you people I've used Splus and now I'm using R and there's some functions that I can't simply find one: sort.col that allows data.frames to be sort by a given col (I saw the funtion sort but that's for vectors. and I can't believe I

I'm having trouble understanding the output from as.windrose(). For one thing, data on a boundary between sectors seem to be left out of the counts. I assume that explains the missing point in the output below (angle 45). Shouldn't one side of each sector interval be open, to include values such as my 45 in the example? Also, why does the angle 180 in my input apparently not result in

...nsistency] Use macro for the parallel parts of plot3d.c- do_contour, do_filledcontour & do_image ... -- plot.c: FIXME: bg needs similar change, but that requires changes to plot.c- the specific drivers. */ -- plot.c: /* FIXME: should this skip 0-sized symbols? */ plot.c- thiscol = INTEGER(col)[i % ncol]; -- plot.c: /* FIXME? plot.c- * Seems like the logic here is just draw from xmin to xmax -- plot.c: /* FIXME: should this skip 0-sized symbols? */ plot.c- GRect(xx - rx, yy - rx, xx + rx, yy + rx, DEVICE, -- plot.c: /* FIXME: should this skip 0-sized symbols? */ plot.c-...