Displaying 2 results from an estimated 2 matches for "imydata".
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mydata
2011 Aug 31
1
formatting a 6 million row data set; creating a censoring variable
...", "3",
"3", "3", "3", "3", "3", "4")), .Names = c("gender", "mygroup",
"id"), class = "data.frame", row.names = c(NA, -20L))
# here is plyr solution with idata.frame
library(plyr)
imyData <- idata.frame(myData)
timeData <- idata.frame(ddply(imyData, .(id,mygroup), summarize,
mytime = length(mygroup)))
makeCensor <- function(x) {
myvec <- rep(0,length(x))
lastInd <- length(myvec)
myvec[lastInd] = 1
myvec
}
plyrSolution <- ddply(timeData, "id&quo...
2007 Mar 23
4
Conversion from string to date type
Hi,
I'm on my very first steps to R and so I hope that I do
not ask a really stupid questions but I did not found it
via R-Search, in the FAQ or Google (BTW, the name "R" is
not a really good seekiong criterion ;-) ).
I have a data file containing a table that containes
dates and values like
date\t value1\t value2, ...
01.03.2007\t 17\t 42\t ...
02.03.2007\t 2\t 3\t ...