Some issues trying to read a file with cbc.read.table function in R + using filter while reading files

Question

a)I\'m trying to read a relatively big .txt file with the function cbc.read.table from the colbycol package in R. According to what I\'ve been reading

Answer 1

If you want a preview, then just use read.table with nrow=20 and the colClasses argument set to read your columns.