I have CSV 文件 (24.1 MB)我无法完全读懂我的 R 会话。当我在电子表格程序中打开该文件时，我可以看到 112,544 行。当我将其读入 R 时read.csv我只收到 56,952 行和此警告：
cit <- read.csv("citations.CSV", row.names = NULL,
comment.char = "", header = TRUE,
stringsAsFactors = FALSE,
colClasses= "character", encoding= "utf-8")
Warning message:
In scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, :
EOF within quoted string
我可以将整个文件读入 R 中readLines:
rl <- readLines(file("citations.CSV", encoding = "utf-8"))
length(rl)
[1] 112545
但我无法将其作为表格返回到 R 中（通过read.csv):
write.table(rl, "rl.txt", quote = FALSE, row.names = FALSE)
rl_in <- read.csv("rl.txt", skip = 1, row.names = NULL)
Warning message:
In scan(file, what, nmax, sep, dec, quote, skip, nlines, na.strings, :
EOF within quoted string
我该如何解决或解决此 EOF 消息（这似乎更像是错误而不是警告）以将整个文件放入我的R会议？
我在使用其他读取 CSV 文件的方法时也遇到类似的问题：
require(sqldf)
cit_sql <- read.csv.sql("citations.CSV", sql = "select * from file")
require(data.table)
cit_dt <- fread("citations.CSV")
require(ff)
cit_ff <- read.csv.ffdf(file="citations.CSV")
这是我的 sessionInfo()
R version 3.0.1 (2013-05-16)
Platform: x86_64-w64-mingw32/x64 (64-bit)
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
[3] LC_MONETARY=English_United States.1252 LC_NUMERIC=C
[5] LC_TIME=English_United States.1252
attached base packages:
[1] tools tcltk stats graphics grDevices utils datasets methods base
other attached packages:
[1] ff_2.2-11 bit_1.1-10 data.table_1.8.8 sqldf_0.4-6.4
[5] RSQLite.extfuns_0.0.1 RSQLite_0.11.4 chron_2.3-43 gsubfn_0.6-5
[9] proto_0.3-10 DBI_0.2-7
