Friends
I can't quite find a direct answer to this question from the lists, so here
goes:
I have several dataframes, 200+ columns 2000+ rows. I wish to script some
operations to perform on some of the variables (columns) in the data frames not
knowing what the column number is, hence have to refer by name. I have variable
names in a text file "varlist". So, something like this:
for (i in 1:length(varlist)){
j<-varlist[i]
v<-mean(Dataset[[j]])
print(v)
}
Now, if I force it
j<-"Var1"
v<-mean(Dataset[[j]])
print(v)
then it works, but not if i read the varlist as above.
Looking at "j" I get:
> print(j)
V1
1 Var1
Hence there is a lot of other stuff read into "j" that confuses "mean". I can't
figure out how to just get the value of the variable and nothing else. I've
tried space separated, comma separated, tab separated lists and all give the
same error. I've tried get(), parse()... no go.
Any suggestions?
Thanks a lot
Jon
Soli Deo Gloria
Jon Erik Ween, MD, MS
Scientist, Kunin-Lunenfeld Applied Research Unit
Director, Stroke Clinic, Brain Health Clinic, Baycrest Centre
Assistant Professor, Dept. of Medicine, Div. of Neurology
University of Toronto Faculty of Medicine
Kimel Family Building, 6th Floor, Room 644
Baycrest Centre
3560 Bathurst Street
Toronto, Ontario M6A 2E1
Canada
Phone: 416-785-2500 x3648
Fax: 416-785-2484
Email: jw...@klaru-baycrest.on.ca
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