search for: tmpmat

...distinct times #Gastric$time is all the time points either death or largest obervation time. #srvGastA$time is all the unique times newGas <- data.frame(start=0, stop=1, Dth=1, Ploidy=1, tim=0) #newGas <- r(0,1,1,1,0) for (i in 2:90) { timind <- match(Gastric$time[i],srvGastA$time) tmpmat <- array(0, dim=c(timind,5))#build an array with dim('index',5) tmpmat[,4] <- rep(Gastric[i,1], timind)#fourth column, return i's group tmpmat[timind,3] <- Gastric$Dth[i] tmpmat[,1] <- if(timind>1) c(0,srvGastA$time[1:(timind-1)]) else 0 tmpmat[,2] <- s...

...selected positions seems more difficult. When I use the geographical positions of the data.frame as index, blobs are changed and not individual elements. How can I circumvent this feature of R? E.g: in this situation I would like the downward diagonal to be changed, not the square box... > tmpmat <- matrix(NA,nrow=9,ncol=10,dimnames=list(formatC(tmplat,format="f",digits=2),formatC(tmplon,format="f",digits=2))) > tmpmat 8.00 9.50 9.75 14.25 15.00 15.75 18.00 20.50 21.75 25.25 55.25 NA NA NA NA NA NA NA NA NA NA 56.75 NA NA NA...

...1000 I currently do this using a loop, and the result is abysmally slow: f <- function(x) { retval <- c(0, 0); x <- coredata(x); retval[2] <- sum(x[,2]); retval[1] <- sum(x[,1] * x[,2]) / retval[2]; retval; } #ts is a zoo timeseries uniqueTimes <- unique(index(ts)) tmpMat <- NULL for(i in 1:length(uniqueTimes)) { tmpMat <- rbind(tmpMat, f(ts[uniqueTimes[i]])); } ts.agg <- zooreg(tmpMat, order.by=uniqueTimes); I'm sure the above can be done with aggregate or tapply or by or something, but I haven't managed to get those to work. Any suggestion...

Hi, I'd like to blow up portions of my graph and put it in boxes beside the graph.Is there an addon to do this? -- Rajesh.J [[alternative HTML version deleted]]

Hello :) I'm just starting out with R and would appreciate your help with a couple of problems I am running into. I have used Sys.glob to get a list of all filenames having a particular file extension (in my case, *.txt) I would now like to use this list in the following manner: I would like to use each filename from the list and open that file into a tab separated matrix and proceed. How can

How I make the below matrix | a^0 0 0 ... 0 | | a^1 a^0 0 ... 0 | | a^2 a^1 a^0 ... 0 | | . | | . | | . | | a^n a^(n-1) a^(n-2) ... a^0 | with no loops, where "a" is a constant? ======================================================================== C?zar de Freitas Depto. de Estat?stica - UFPE Recife - Pernambuco - Brasil