Dear David!
Thank you for your response. I like csv files,
because in that case I can easily compare
different versions of similar data.frames.
Similar in this case means that I may add a
column or change some transformation command for
one column. With dput it's rather difficult, and
when I tried the compare package, I had no
success comparing data.frames containing Surv objects.
Thanks again
Heinz
At 22:31 19.12.2008, David Winsemius wrote:
On Dec 19, 2008, at 2:04 PM, Heinz Tuechler wrote:
Dear All,
trying to write a data.frame, containing Surv objects to a csv-file
I get
"Error in dimnames(X) <- list(dn[[1L]], unlist(collabs, use.names =
FALSE)) :
length of 'dimnames' [2] not equal to array extent".
See example below.
May be, I overlooked something, but I expected that also data.frames
containing Surv objects may be written to csv files.
Is there a better way to write to csv files?
Yes, if the goal is creating an ASCII structure that can be recovered
by an R interpreter:
?dput
?dget
> dput(df.soac, "test")
> copy.df.soac <- dget("test")
> all.equal(df.soac, copy.df.soac)
Doesn't give you a result that you would want to read with Excel,
but that does not appear to be your goal. You can examine it with a
text editor.
--
David Winsemius
Thanks,
Heinz Tüchler
### write Surv-object in csv-file
library(survival)
## create example data
soa <- Surv(1:5, c(0, 0, 1, 0, 1))
df.soa <- data.frame(soa)
write.csv(df.soa, 'df.soa.csv') ## works as I expected
read.csv('df.soa.csv') ## works as I expected
df.soa2 <- data.frame(soa, soa2=soa)
write.csv(df.soa2, 'df.soa2.csv') ## works as I expected
read.csv('df.soa2.csv') ## works as I expected
char1 <- letters[1:5]
df.soac <- data.frame(soa, char1)
write.csv(df.soac, 'df.soac.csv') ## generates the following error
message:
Error in dimnames(X) <- list(dn[[1L]], unlist(collabs, use.names =
FALSE)) :
length of 'dimnames' [2] not equal to array extent
df.csoa <- data.frame(char1, soa)
write.csv(df.csoa, 'df.soac.csv') ## generates the following error
message:
Error in dimnames(X) <- list(dn[[1L]], unlist(collabs, use.names =
FALSE)) :
length of 'dimnames' [2] not equal to array extent
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status Patched
major 2
minor 8.0
year 2008
month 11
day 10
svn rev 46884
language R
version.string R version 2.8.0 Patched (2008-11-10 r46884)
> sessionInfo()
R version 2.8.0 Patched (2008-11-10 r46884)
i386-pc-mingw32
locale:
LC_COLLATE=German_Austria.1252;LC_CTYPE=German_Austria.
1252;LC_MONETARY=German_Austria. 1252;LC_NUMERIC=C;LC_TIME=German_Austria.1252
attached base packages:
[1] splines stats graphics grDevices utils datasets
methods
[8] base
other attached packages:
[1] survival_2.34-1
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