[英]How to write a special character in first line with write.table
我有一个数据集ped
,我想将其写入制表符分隔的文件中。 但是,标头需要以井号( #
)开头(由于程序要求读取文件的人。如何将井号放在其中?
ped <- ped [,c('FAM_ID','IND_ID','FAT_ID','MOT_ID','SEX','DISEASE','RR','AGE')]
setwd(proj.dir)
write.table(ped, "DB/asymmetry.ped", sep="\t", row.names = FALSE, quote = FALSE)
您可以尝试:
cat("#", file = "DB/asymmetry.ped")
write.table(ped, "DB/asymmetry.ped", sep="\t", row.names = FALSE, quote = FALSE,
append = TRUE)
注意,您将从write.table
收到警告消息,因为这是默认行为:
## somewhere inside `write.table`:
if (!is.null(col.names)) {
if (append)
warning("appending column names to file")
但不会造成伤害。
另一种可能的方法是在第一个列名后附加"#"
,然后照常使用write.table
(带有quote = FALSE
):
ped <- ped [,c('FAM_ID','IND_ID','FAT_ID','MOT_ID','SEX','DISEASE','RR','AGE')]
NAMES <- names(ped)
NAMES[1] <- paste0("#", NAMES[1])
setwd(proj.dir)
write.table(ped, "DB/asymmetry.ped", sep="\t", row.names = FALSE, quote = FALSE,
col.names = NAMES)
我会推荐这种方式。 让我们进行测试:
x <- trees[1:3, ] ## use built-in dataset `trees`
NAMES <- names(x)
NAMES[1] <- paste0("#", NAMES[1])
## write to screen (stdout) for inspection
write.table(x, row.names = FALSE, col.names = NAMES, quote = FALSE)
#Girth Height Volume
8.3 70 10.3
8.6 65 10.3
8.8 63 10.2
如果要在每行/每行的开头添加#
,则可以在第一列后附加"#"
列:
ped <- cbind.data.frame("#" = "#", ped[,c('FAM_ID','IND_ID','FAT_ID','MOT_ID','SEX','DISEASE','RR','AGE')])
setwd(proj.dir)
write.table(ped, "DB/asymmetry.ped", sep="\t", row.names = FALSE, quote = FALSE)
再次,让我们进行测试:
x <- cbind.data.frame("#" = "#", trees[1:3, ])
## write to screen (stdout) for inspection
write.table(x, row.names = FALSE, quote = FALSE)
# Girth Height Volume
# 8.3 70 10.3
# 8.6 65 10.3
# 8.8 63 10.2
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.