text manipulation in bash: sort columns according to the first row
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Tokenize a line, save into a temp file, sort the temp file
set() can be used for the purpose of parsing the line into tokens. The tokens can then be re-ordered.
Sorry, I don't have a functional example to provide, but it goes something like this:
tmpfile = "MyTmpFile"
# You may want to change the field separator value. Here it is set to ":"
# If not, ignore the next 2 lines.
orig_IFS = $IFS
IFS = ":"
while read line
# Tokenize the input line.
# You now have the tokens of the input line.
print "token 1 ..... $1"
print "token 2 ..... $2"
print "token 9 ..... $9"
# Do your magic. Re-order them?
print "$2 $9 $1" > $tmpfile
# Sort the tempfile, selecting the field(s) of interest.
How should the code look like for this function?
You can try it as is. Suppose you write it in a file called test.awk:
awk -f test.awk file
where file is the file you want to sort out. It parses the first row to retrieve the sorted indexes, that is the order by which to sort all the other lines, then it prints the sorted lines accordingly. If it is not clear, feel free to ask. More details about the asorti function, here.