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Top Forums UNIX for Dummies Questions & Answers Converting column to rows for every 3 lines in the column Post 302644209 by kokoro on Monday 21st of May 2012 01:10:38 PM
Old 05-21-2012
Converting column to rows for every 3 lines in the column

Hi gurus!

Please help me with this one. I have an file with the following contents:
Code:
a
b
c
d
e
f
g
h
i
j

I would like to make to transform it to look like this as my output file:
Code:
a,b,c
d,e,f
g,h,i
j

So for every 3 lines of the input file is read, that three lines of the column will converted into a comma delimited row. This should be done for every 3 lines until it reaches the end of the input file.


Any thoughts of using awk?

Thanks in advance! Smilie
 

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fmt(1)							      General Commands Manual							    fmt(1)

NAME
fmt - format text SYNOPSIS
width] [file...] DESCRIPTION
The command is a simple text formatter that fills and joins lines to produce output lines of (up to) the number of characters specified in the width option. The default width is 72. concatenates the arguments. If none are given, formats text from the standard input. Blank lines are preserved in the output, as is the spacing between words. does not fill lines beginning with a period for compatibility with Nor does it fill lines starting with Indentation is preserved in the output and input lines with differing indentation are not joined (unless is used). can also be used as an in-line text filter for the command: reformats the text between the cursor location and the end of the paragraph. Options recognizes the following options: Crown margin mode. Preserve the indentation of the first two lines within a paragraph and align the left margin of each subsequent line with that of the second line. This is useful for tagged paragraphs. Split lines only. Do not join short lines to form longer ones. This prevents sample lines of code, and other such "formatted" text, from being unduly combined. Fill output lines to up to width columns. WARNINGS
The width option is acceptable for BSD compatibility, but it may go away in future releases. SEE ALSO
nroff(1), vi(1). fmt(1)
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