Displaying 2 results from an estimated 2 matches for "dft1".
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df1
2006 Dec 05
0
How to join data.frames containing Surv objects?
...arttime <- rep(0,5)
stoptime <- 1:5
event <- c(1,0,1,1,1)
group <- c(1,1,1,2,2)
## build Surv object
survobj <- Surv(starttime, stoptime, event)
## build data.frame with Surv object
df.test <- data.frame(survobj, group); df.test; str(df.test)
## split in two data frames
dft1 <- df.test[1:3,]; dft1; str(dft1); class(dft1$survobj) # class is Surv
dft2 <- df.test[4:5,]; dft2; str(dft2); class(dft2$survobj) # class is Surv
## rbind in one data.frame
dft12 <- rbind(dft1, dft2); dft12; str(dft12); class(dft12$survobj) #
class is matrix
## merge in one data.frame...
2012 Jan 17
2
How to loop on file names
...example of what I am trying to do.
List of files: file1(A,B,C, D1...Dn), file2(A,B,C,E1,...,En),
file3(A,B,C,F1,...,Fn)
Procedure I want to apply on each file:
dft <- melt(df,id=c('A','B','C'))
dft$X <- substr(dft$variable,1,3)
dft$Y <- substr(dft$variable,4,8)
dft1 <- cast(dft, A+B+C+X ~ Y,value="response")
As you see all the files contains the same 3 variables A,B,C that I use
in the procedure.
So I want to apply the procedure on all the file in a loop.
Something like :
filelist <- c('file1' , 'file2' , 'file3')
fo...