Dear helpeRs,
I have a?column of various different entry types denoting missing value codes
for a data frame. Elements can be numbers (e.g. 9), combinations of numbers
e.g. in the form c(0,9,99), or NULL (for no valid missing data code).
I used
codes<-read.table(paste
(path2, "MissingCodes.csv",sep=""),header=FALSE,as.is=T)
codes <- as.list(codes$V1)
to read the codes and transform them into a list, which unfortunately is a
list of character entries:
codes <- as.list(c("NULL", "9", "999",
"c(0,9)", "c(999,99)"))
### reproducible mini version of what I get
I do not know how to transform these to the numeric versions I need. With
codesnum<-lapply(codes,function(obj){if (!is.na(as.double(obj)))
as.double(obj)?else { if (obj=="NULL") NULL
else obj)}})
I can handle everything but the "c(0,9)" type characters. I have
without
success tried various ways to get these into numeric versions (c(0,9)).
Any suggestions ? There might even be something quite simple around?
Thanks and regards, Ulrike