Conditional splitting in more file

Shell Programming and Scripting
1

Dear All,
I was wondering in how split one file in multiple file in a conditional way.

Briefly, I have a file like this:

>Id1
textA
>Id2
textB

and my outputs file (2 in this case) shoul be:

Id1

>Id1
textA

Id2

>Id2
textB

hope you may help me.

Best

G

2

Hello giuliangiuseppe,

Could you please try following and let me know if this helps.

awk '/^>/{++i}{print >> "file" i}'  Input_file

Output will be as follows.

cat file1
>Id1
textA

cat file2
>Id2
textB

Thanks,
R. Singh

3

It works prefectly.
The only things is that should be nice that file name is the first line of each file (without

>

)

cat Id1
>Id1
textA

cat Id2
>id2
textB

Best

Giuliano

4

Try like

awk '/^>/{FN=$0; sub (">", "", FN)}{print > FN}'  file
Id1:
>Id1
textA
Id2:
>Id2
textB
1 Like
5

Hello Giuliano,

Could you please try following then, it may help you in same.

awk '/^>/{sub(/>/,X,$0);i=$0} {print >> i}' Input_file

Output will be as follows.

cat Id1
Id1
textA
  
cat Id2
Id2
textB

Thanks,
R. Singh

1 Like
6

If your input file is to be split into several files, you may have to close files when you're done writing to them. Even if you just have a few file to be written, it is a good idea to close files when you're done with them...

If you run into problems with the other suggestions you've been given, you could try:

awk '/^>/{close(f);f=substr($0,2)}{print > f}' file

As always, if you want to try any of these awk script on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk .