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Hi, I have the following input file. $ cat main.txt CEL_A CELL_B 1 4 2 5 2 6 Then I run read.table in R. > f=read.table('main.txt', header=T, check.names=F, sep='\t') > head(f) \ufeffCEL_A CELL_B 1 1 4 2 2 5 3 2 6 > f$CEL_A NULL I'm not sure where the special character \ufeff comes from. Could anybody let me know what is the problem?

Hello, How ls() only functions or only data objects (basically anything other than functions) such as data.frame, numeric ...? John [[alternative HTML version deleted]]

I get the following error when I try to modify the names of the object returned by get(). Does anybody know how to do so? (I could use as.vector() to remove the names, but I'm interested in how to modify the object returned by get().) $ cat main_get_name_assign.R x=1:10 names(x)=letters[1:10] names(get('x'))=LETTERS[1:10] #names(x)=LETTERS[1:10] x $ Rscript main_get_name_assign.R

Hi All, ls() doesn't show cu.summary. ?ls says "When invoked with no argument at the top level prompt, \u2018ls\u2019 shows what data sets and functions a user has defined." Therefore, the reason ls() doesn't show cu.summary is because cu.summary is from a package but not user defined. Is there a way to show not only user defined data sets but also data sets from loaded

Dear All, I'm not sure if I understand the parameter stringsAsFactors correctly. I'm trying to convert the string columns in aframe1 to factors. But it seems stringsAsFactors=T in as.data.frame() doesn't do anything. Could anybody let know what is the correct way to converting strings to factors? > aframe1=data.frame(x=LETTERS[1:10], y=LETTERS[1:10], stringsAsFactors=F) >