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Full Discussion: help printing two consecutive columns, every twenty in a large matrix
Top Forums Shell Programming and Scripting help printing two consecutive columns, every twenty in a large matrix Post 302504728 by flotsam on Tuesday 15th of March 2011 10:03:08 AM
Old 03-15-2011
Thanks for your reply. I've tried your example but I am still having problems. The files I would like to modify are more than 200 cols wide and vary extensively and when I try and use different file lengths I get unexpected results:
Code:
echo {1..400} |awk '{for (i=19;i<=NF;i+=20) printf "%s %s ",$i,$(i+i);printf ""}'
19 38 39 78 59 118 79 158 99 198 119 238 139 278 159 318 179 358 199 398 219  239  259  279  299  319  339  359  379  399

Also I always want the first two columns and I thought I'd modify your example so i=1 and the columns seem to bounce around a lot:
Code:
echo {1..200} | awk '{for(i=1;i<=NF;i+=20) printf "%s %s ",$i,$(i+i);printf ""}'
1 2 21 42 41 82 61 122 81 162 101  121  141  161  181

Any idea why this might be occurring?

Thanks!
Last edited by Scott; 03-15-2011 at 01:10 PM.. Reason: Code tags, please...
 

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LEARN ABOUT HPUX

pdp11

machid(1)						      General Commands Manual							 machid(1)

NAME

       machid: hp9000s200, hp9000s300, hp9000s400, hp9000s500, hp9000s700, hp9000s800, hp-mc680x0, hp-pa, pdp11, u370, u3b, u3b10, u3b2, u3b5, vax
       - provide truth value about processor type

SYNOPSIS

DESCRIPTION

       The following commands return a true value (exit code 0) if the a processor type matches the command name.  Otherwise a false  value  (exit
       code  nonzero)  is returned.  These commands are commonly used within makefiles and shell procedures to improve portability of applications
       (see make(1)).

				       +-----------+-------------------------++--------+--------------------------+
				       |Command    | True for		     ||Command | True for		  |
				       +-----------+-------------------------++--------+--------------------------+
				       |hp9000s200 | Series 200 	     ||pdp11   | PDP-11/45 or PDP-11/70   |
				       |hp9000s300 | Series 300 	     ||u3b     | 3B20 computer		  |
				       |hp9000s400 | Series 400 	     ||u3b2    | 3B2 computer		  |
				       |hp9000s500 | Series 500 	     ||u3b5    | 3B5 computer		  |
				       |hp9000s700 | Series 700 	     ||u3b10   | 3B10 computer		  |
				       |hp9000s800 | Series 800 or 700	     ||u370    | IBM System/370 computer  |
				       |hp-mc680x0 | Series 200, 300, or 400 ||vax     | VAX-11/750 or VAX-11/780 |
				       |hp-pa	   | Series 700 or 800	     ||        |			  |
				       +-----------+-------------------------++--------+--------------------------+
EXAMPLES

       Given a shell script that must behave differently when run on an HP 9000 Series 700 or 800 system, select the correct code  segment  to	be
       executed:

WARNINGS

       always  returns	true on both Series 800 and Series 700 systems.  Therefore, when using this command in scripts to determine hardware type,
       always use both and in the appropriate sequence to ensure correct results (see

       machid(1) will no longer provide support for future machines beyond the Series 800 and Series 700 systems.  Decisions should  be  based	on
       the hardware and software configuration information returned by getconf(1).

SEE ALSO

       getconf(1), make(1), sh(1), test(1), true(1).

																	 machid(1)
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