带有awk的数据矩阵

Question

Warning, not an awk programmer.

I have a file, let's call it file.txt. It has a list of numbers which I will be using to find the information I need from the rest of the directory (which is full of files *.asc). The remaining files do not have the same lengths, but since I will be drawing data based on file.txt, the matrix I will be building will have the same number of rows. All files DO however contain the same number of columns, 3. The first column will be compared to file.txt, the second column of each *.asc file will be used to build the matrix. Here is what I have so far:

awk '
    NR==FNR{
        A[$1];
        next}
    $1 in A
       {print $2 >> "data.txt";}' file.txt *.asc

This, however, prints the information from each file below the previous file. I want the information side by side, like a matrix. I looked up paste, but it seems to be called before awk, and all examples were only of a couple of files. I tried it still in place of print and did not work.

If anyone could help me out, this would be the last piece to my project. Thanks so much!

Answer 1

You could try:

awk -f ext.awk file.txt *.asc > data.txt

where ext.awk is

NR==FNR {
    A[$1]++
    next
}
FNR==1 {
    if (ARGIND > 2)
        print ""
}
$1 in A {
    printf "%s ", $2
}
END {
    print ""
}

Update

If you do not have Gnu Awk, the ARGIND variable is not available. You could then try

NR==FNR {
    A[$1]++
    next
}
FNR==1 {
    if (++ai > 1)
        print ""
}
$1 in A {
    printf "%s ", $2
}
END {
    print ""
}