Dear list,
I have a problem with defining a function (see below) to read my testfile
(see testfile). My function only returns mydata I wish to work with
attr(mydata, 'fc') as well (for labelling a plot). Principally it works if
I do not insist on this function but it would be much easer if it is
possible to return mydata AND attr(mydata, 'fc') by using a function.
1) testfile:
Id;fc;zat;dat;hat
PG;1,3;1;2;3
HU;2,5;0;2;5
JZ;1,8;1;0;4
2) my function:
read.data <- function(file, ...){
mydata <- read.csv2 (file, header=TRUE, as.is=TRUE) # read everything
fc <- mydata[,2] # extract FC column
rownames(mydata) <- mydata[,1] # same for gene names to be used as
rownames
mydata <- mydata[,-(1:2)] # drop those two columns
attr(mydata, 'fc') <- fc # attach FC back as attribute
return(mydata) # and return
# return fc or return attr(mydata, 'fc') does not work
}
further code is like this:
newdata <- read.data("testfile")
head (newdata) #works but not
fc # or
attr(mydata, 'fc') # it does not work if I include return fc or attr... in
my function neither
Then I can get access to newdata and on but not on fc or attr(mydata, 'fc').
Is there a possibility to use function and having access to attr AND
newdata?
Thanks
Sincerely
Hermann Norpois
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