我需要使用read.table函数来导入数据。数据在.txt文件中，我的“销售”数字输入在“引号”中。当我尝试转换时，得到NA。我只需要转换此列。
尝试转换为单个字符串或矩阵以消除“”
car<-read.table("C:/Desktop/STA 675/HW3/cardata_hw3.txt",header = FALSE,
stringsAsFactors = FALSE)
car
car1<-
data.frame(Year=car$V1,Country=car$V2,Type=car$V3,Sales=car$V4,Quarter=car$V5,stringsAsFactors = FALSE)
head(car1,n=7)
xxx<-as.numeric(car1$Sales)
## Sales data has to be in Numeric, not chr, however, when I convert:
NAs introduced by coercion
DATA I am working off:
2013 US CARS "213,504.05" Second
2013 Us Cars "328,450.45" Forth
2013 US TRUCKS "116,735.65" Second
2013 Us Trucks "253,945.62" Forth
2013 CANADA CARS ? Second