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Full Discussion: Rearrange rows by group pairs
Top Forums Shell Programming and Scripting Rearrange rows by group pairs Post 303018946 by senhia83 on Tuesday 19th of June 2018 04:53:32 PM
Old 06-19-2018
Rearrange rows by group pairs
Hello gurus,

I have two variable columns 1 and 2 , and their respective groups in 3 and 4

Code:
var1 var2 gr1 gr2
a b g h
c d h g
d f d h
f g h g
d r h d 
p q a b
h y h g
r t g h

I want to rearrange the rows in such a way that all similarly grouped (var1 var2) pairs are together . The similarity rule is (gr1 gr2) pair is the same as (gr2 gr1) pair.


For example
the variable pair (a b) has group (g and h) , group (g and h) pair is equivalent to group (h and g) pair. Since variables (c d) has group pair of ( h and g) also equiavalent to (g and h), these can be clubbed together.

In other words columns $3"__"$4 is the same as $4"__"$3

So my desired output is


Code:
1 a b g h
1 c d g h
1 h y g h
1 r t g h
1 f g g h
2 d f d h
2 d r d h
3 p q a b


To achieve this I`m trying to put the last 2 columns in an array and output in a sorted way. Then I can sort by the last columns and get my result, , but it gives me a blank output.

Code:
awk  '{delete a;  s=x; a[$3];a[$4]; for (i=1;i<=length(a);i++)  {  s =s"__"a[i]};  print $1,$2,s}' infile | sort -k3,3 | head


please assist, row order doesn't matter as long as similar groups are togther. Please note this is made up data, and groups have no alpha or numeric pattern.
 

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LEARN ABOUT DEBIAN

pfspad

pfspad(1)						      General Commands Manual							 pfspad(1)

NAME

       pfspad - Add borders to a frame in PFS stream

SYNOPSIS

       pfspad  [--left	<columns>]  [--right <columns>] [--top <rows>] [--bottom <rows>] [--width <new_width>] [--height <new_height>] [--R <val>]
       [--G <val>] [--B <val>] [--Y <val>] [--help]

DESCRIPTION

       Add borders to each frame in PFS stream. User specifies size of left, right, top and bottom border or size of an  output  image.  Color	of
       borders can be specified as well.

OPTIONS

       --left <columns>, -l <columns>
	      Width in pixels of the left border.

       --right <columns>, -r <columns>
	      Width in pixels of the right border.

       --top <rows>, -t <rows>
	      Height in pixels of the top border.

       --bottom <rows>, -b <rows>
	      Height in pixels of the bottom border.

       --width <new_width>, -W <new_width>
	      Width of an output image. Note that --width can be mixed with either --left or --right option.

       --height <new_height>, -H <new_height>
	      Height of an output image. Note that --height can be mixed with either --top or --bottom option.

       --R <val>, -R <val>, --G <val>, -G <val>, --B <val>, -B <val>
	      Color of borders in RGB mode. Default color is black, and if some of the components is not specified, its value is set to 0.0.

       --Y <val>, -Y <val>
	      Color of borders in luminance mode.

       --help, -h
	      Print a list of commandline options.

EXAMPLES

       pfsin image.hdr | pfspad --left 50 --bottom 20 | pfsout out.hdr
	      Add 50 columns to the left and 20 rows to the bottom side of image.hdr.  Color of borders is default black.

       pfsin image.hdr | pfspad --top 20 --height 500 --width 400 --R 1.0 | pfsout out.hdr
	      Add 20 rows to the top side of image.hdr and create output image out.hdr 500 pixels in height and 400 pixels in width. Color of bor-
	      ders is set to red.

SEE ALSO

       pfsin(1) pfsout(1)

BUGS

       Please report bugs and comments to Dorota Zdrojewska <dzdrojewska@wi.ps.pl>.

																	 pfspad(1)
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