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I want to create a script with gawk.

I have the following file with 2 columns:


A 1
A 2
A 3
B 1
B 2
B 3
C 1
C 2
D 1
D 2
D 3
D 4

and i want to convert to:

I'm working on windows so i change:

NR==1{
print;nf=NF;next
}
FNR==1{next}
nf!=NF{
system("del -f outfile"); exit
}1

and error is:

The process can not access the file because it...

Thanks in advance.

If the files have the same number of columns it works fine.
But if any file does not have the same number of columns gives error

i have error:
'0 Is not recognized as an...

I believe that I did not explained well.

What I want is the following:

file1.txt:
a b c
1 1 1
2 2 2
3 3 3
4 4 4

file2.txt:
a b c
5 5 5
6 6 6
7 7 7
8 8 8

file3.txt:
a b c

can send me please the code integrated that before processing all files validate the headers - number of columns is equal in all.

Only creates or process the new merged file if the number of...

Thanks

But can I validate that the number of columns of each file is the same?

hi all!

i'm an awk newbie and have been trying in vain to merge N files together.

ie.

file1.txt:
a b c
1 1 1
2 2 2
3 3 3
4 4 4

file2.txt:
a b c
5 5 5
6 6 6
7 7 7
8 8 8