[R] How to read an excel data into R?

[Ling Jin]

Hi all,

Does anybody know the easiest way to import excel data into R? I copied 
and pasted the excel data into a txt file, and tried read.table, but R 
reported that

Error in read.table("data_support.txt", sep = " ", header = T) :
         more columns than column names

Thanks!

Ling