Awk: conversion of matrix formats Post: 302780899

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Top Forums Shell Programming and Scripting Awk: conversion of matrix formats Post 302780899 by Don Cragun on Friday 15th of March 2013 09:18:52 AM

03-15-2013

Registered User

Quote:

Originally Posted by dietmar13

dear don cragun,

i use the table for another program, therefore i don't need a pretty print. I need tab's.

and there i found another little problem,
after each line there seems to be a tab, but I don't need this tab for the last field in each line.

how can i easily replace the last tab with a newline.

Code:

fn=$1
fname=${fn%.*}
echo $fname

awk 'BEGIN {FS="\t"};
    NF >= 3 {HD[$1]++; HD[$3]++; PP[$1,$3] = PP[$3,$1] = 1 }
    END    {printf "\t"
        for (i in HD) { printf "%s\t" ,i } printf "\n" #<- here replace the tab with newline
        for (i in HD) {printf "%s\t", i ;
            for (j in HD) { printf "%s\t", PP[i,j]?PP[i,j]:"0" } printf "\n" #<- here replace the last tab with newline
            } }' $fn > $fname.adj

Please look again at the script I suggested in my last post in this thread. It got rid of the trailing tabs. The spots marked in red above are the areas that need to change to get rid of trailing tabs.

The BEGIN clause marked in green above does not match the sample input you provided, so I took it out. If you really have tab delimiters in your input AND have spaces in some of your field names, put that clause back in the script I provided. The ++'s marked in orange don't affect the output of your program, but will make it run a little slower. (It won't be noticeable with your sample data, but if you have millions of lines of input, it will make a difference. You will note that I removed them in the script I provided.)

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