Importing a txt file when number of columns varies?
问题 I have problems importing a .txt file into R because the number columns changes from eight to nine. Initially, my data has eight columns: Date, Open, High, Low, Close, Volume, Open Interest, Delivery Month Later, I add an additional column Unadjusted close . How should I import the data? Somehow the Unadjusted close column has to be ignored at the beginning. I've tried data1 <- read.table("AD_0.TXT", sep=",", header=TRUE) but that doesn't work. 回答1: You need to use the fill argument in the