[英]how to merge lines that do not begin with certain character
if i have the following: 如果我有以下内容:
>A13P0
ACCATAGAGAG
CCCGAGATTTA
>03HK2
ACACAGTGTGT
TTAGAGGGAGA
How do I merge lines that do not begin with >
? 如何合并不以
>
开头的行?
ie 即
>A13P0
ACCATAGAGAGCCCGAGATTTA
>03HK2
ACACAGTGTGTTTAGAGGGAGA
thanks! 谢谢!
perl -ne'
if (/^>/) {
print("\n") if $. != 1;
} else {
chomp;
}
print;
} {
print("\n") if $. != 1;
'
See Specifying file to process to Perl one-liner for usage. 请参阅指定要处理的文件以Perl单线进行使用。
I know this has been asked/answered a thousand times but I can't find it so: 我知道这个问题已经被问了一千遍了,但是我找不到它:
$ awk '/^>/{print (NR>1?ORS:"") $0; next} {printf "%s", $0} END{print ""}' file
>A13P0
ACCATAGAGAGCCCGAGATTTA
>03HK2
ACACAGTGTGTTTAGAGGGAGA
使用perl命令行:
perl -pE '$.>1 && !s/^>/\n>/ && chomp; END{say}' file
With sed : 与sed:
$ sed ':a;$!N;/>/!{s/\n\([^>]\)/\1/;ta};P;D' file
>A13P0
ACCATAGAGAGCCCGAGATTTA
>03HK2
ACACAGTGTGTTTAGAGGGAGA
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