similar to: dataframe of dataframes?

Hi, I have a dataframe column of the form v<-c("Fri Feb 05 20:00:01.43000 2010","Fri Feb 05 20:00:02.274000 2010","Fri Feb 05 20:00:02.274000 2010","Fri Feb 05 20:00:06.34000 2010") I need to convert this to datetime form. I did the following.. lapply(v,function(x){strptime(x, "%a %b %d %H:%M:%OS %Y")}) This gives me a list that looks like

Hi, I have a preallocated dataframe to which I have to add a list whose vectors will become rows in the dataframe. This is done iteratively. How can I do this? I'm dealing with very large numbers...list of 1000 vectors to a dataframe of 200000 iteratively for e.g. my list is as follows ll<-list(c("1","2","3"),c("2","3","4")) I

Hi, I have a list which looks like this... > str(y) List of 10 $ : chr [1:4] "ABCD" "5" "0" "1" $ : chr [1:4] "DEF" "15" "1" "16" $ : chr [1:4] "AAA" "2" "17" "8" $ : chr [1:4] "SSS" "15" "25" "1" $ : chr [1:4] "III"

Hi, I have a vector who contents should look like this, "c" "d" NULL "e" "f" etc or 4 5 6 NULL 7 8 9 how can I represent the null value? [[alternative HTML version deleted]]

Hi, I need to check if a string "<rh>a,b,c,d<rh>" is delimited by two "<rh>" 's as efficiently as possible(I need to do this a lot of times) and return TRUE. Can someone suggest a good technique? [[alternative HTML version deleted]]

Hi, Is it possible for me to read data from shared memory created by a vc++ program into R using bigmemory? [[alternative HTML version deleted]]

Hi, I have a .Call in my R function in a loop that repeats a certain number of times. Each time, the .Call returns a list. So, when I say something like, y<-func() would y be a list of lists?(as many as the number of loops?) [[alternative HTML version deleted]]

Hi, Is it possible for me to store a list of vectors of 1 million entries? like, cc<-list(c(1,2,........1million),c(1,2,........1million)....) also what is the length of the longest string in R? I keep getting info from a socket and keep pasting on a string...when will this start becoming a problem? [[alternative HTML version deleted]]

Hi, I have a loop as follows, dataStr <- character(0) repeat{ fstr<-read.socket(sockfd) if(fstr=="") break dataStr<-paste(dataStr,fstr) } at what point does dataStr stop accepting(gets full)? I'm sending millions of records over the socket and need to know if all of it can go into dataStr. Also, Incase all of it cannot go into dataStr, I need to parse each

Hi, is there a queue implementation in R? [[alternative HTML version deleted]]

Hi, Is it possible to uncompress gzipped data coming over a socket? [[alternative HTML version deleted]]

Hi, I have a function that I'm writing. The arguments in the function are as follows RFF<-function(qtype, qOpt,...){} i.e., I have two args that are compulsary and the rest are optional. Now when my user passes the function call, I need to see what optional args are defined and process accordingly...what I have so far is.. RFF<-function(qtype, qOpt,...){ mc <-

Hi Tim, Assume a store instruction. Store has 2 Operands. I can use the store->getOperand(0) and store->getOperand(1) methods to access these operands in form of Value *. Very likely that the operands are stack variables or formal variables or global variables. It is also possible that these operands are LLVM virtual-registers. Is there a way to determine if a given operand is a

Hi, I built a package in linux and generated its binary using R CMD build --binary testpack. This generated testpack.tar.gz. I tried to install this package in windows using R CMD INSTALL package.tar.gz and I got the error *installing to library 'H:/R-2.11.1/library' *installing *binary* package 'testpack' ... /cygdrive/RTools/bin/cp: target 'xf->>' is not

Hi, I'd like to be able to run a .exe in the background whenever library(package-x) is called. Is this possible? ~Aks [[alternative HTML version deleted]]

Hi, I have the following piece of code, repeat{ ss<-read.socket(sockfd); if(ss=="") break output<-paste(output,ss) } but somehow, output is not receiving all the data that is coming through the socket.My suspicion is on the if statement. what happens if a white space occurs in between the string arriving over the socket? [[alternative HTML version deleted]]

Hi, I have an R function that executes for a little over a minute. When the function starts running, the R interface freezes and doesnt change until the function exits cleanly. Is there someway I can force the function to exit without messing up the interface?(An equivalent of Ctrl-C) Additionally, can I run the function in background and get a notification when it completes? [[alternative HTML

Hi, I've built my own package in windows and when I run R CMD check Package-Name I get, * install options are ' --no-html' * installing *source* package 'AceTest' ... ** libs making DLL ... g++ ...etc. installing to <PATH> ... done ** R ** preparing package for lazy loading ** help Warning: ./man/AceTest-package.Rd:34: All text must be in a section Warning:

#I wish to create a "list of three dataframes" ("results2") from a "list of two dataframes" (temp) and a dataframe ("c")? #Please advise. a <- data.frame(x=c(1,2,3),y=c(5,7,9)) b <- data.frame(x=c(2,4,7,9),y=c(2,3,5,4)) c <- data.frame(x=c(22,34,7,9),y=c(52,63,5,4)) results1 <- list(a,b,c) #what I want #but this is how I need to get there

Hi all, I am not a skillful R programmer and has I am handling with large dataframes (about 30000 x 300) I am in need of an efficient function. I have 4 dataframes with the same dimension. I need to generate other dataframe with the some dimension than the others where in each position it has the median value of the 4 values in the same position coming from the 4 dataframes. Grateful by your