下面的代码生成数据文件，其中每行的列数不同.选项fill=TRUE似乎只有在达到某个字符限制时才起作用.例如，将第1-3行与第9-11行进行比较，注意这两个示例都按预期工作.如何在启用fill=TRUE行的情况下阅读整个notworking1.dat，而不仅仅是前fill=TRUE行？
for (i in seq(1000,1099,by=1))
cat(file="working1.dat", c(1:i, "\n"), append = TRUE)
df <- fread(input = "working1.dat", fill=TRUE)
for (i in seq(1000,1101,by=1))
cat(file="notworking1.dat", c(1:i, "\n"), append = TRUE)
df <- fread(input = "notworking1.dat", fill=TRUE)
for (i in seq(1,101,by=1))
cat(file="working2.dat", c(1:i, "\n"), append = TRUE)
df <- fread(input = "working2.dat", fill=TRUE)
以下solution项也将失败
df <- fread(input = "notworking1.dat", fill=TRUE, col.names=paste0("V", seq_len(1101)))
收到警告信息:
Warning message: In data.table::fread(input = "notworking1.dat", fill = TRUE) : Stopped early on line 101. Expected 1099 fields but found 1100. Consider fill=TRUE and comment.char=. First discarded non-empty line: <<1 2 3 4 ...