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# 1  
Old 01-19-2016
Help with generate a pair of random number


Is anybody experience generate a pair of random number by using awk command?
I wanna to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.

Desired output
2 326
123 1256
341 14
3245 645

I did write the below command:
awk "BEGIN{srand($RANDOM); for(i=1;i<416;i++)print int(1+ rand()*4124)}"

But it only able to generate a single random number (range from 1 to 4124) and repeats it 416 times.

I wish to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.
Thanks for any advice.
# 2  
Old 01-19-2016
Hello perl_beginner,

Could you please try following and let me know if this helps you.
awk 'BEGIN{j=4124;for(i=1;i<=4124;i++){A[i]=i;B[i]=j;j--};for(k in A){print A[k] OFS B[k];c++;if(c>=416){exit}}}'

Code above will show output of both columns differently but one shouldn't expect like each time output will be different from previous run of command, hope it helps. If you have any queries or you have further requirement request you to please provide in details statement.

R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
# 3  
Old 01-19-2016
OSX 10.7.5, default terminal using 'sh'.
for n in {1..416}
	echo "$(( ( $RANDOM % 4124 ) + 1 )) $(( ( $RANDOM % 4124 ) + 1 ))"

This User Gave Thanks to wisecracker For This Post:
# 4  
Old 01-19-2016
You're not too far off! Try
awk "BEGIN{srand($RANDOM); for(i=1;i<416;i++)print int(1+ rand()*4124), int(1+rand()*4124)}"
1931 3259
1456 1559
150 357

This User Gave Thanks to RudiC For This Post:
# 5  
Old 01-19-2016
You guy are awesome and very experience in coding Smilie
Many thanks.

It really help me a lot ^.^

---------- Post updated at 09:12 AM ---------- Previous update was at 09:12 AM ----------

Awesome code Smilie

---------- Post updated at 09:12 AM ---------- Previous update was at 09:12 AM ----------

It worked fine Smilie

---------- Post updated at 09:13 AM ---------- Previous update was at 09:12 AM ----------

It is fantastic Smilie
# 6  
Old 01-19-2016
In case you would like to do something similar in Perl.

perl -le 'for(1..416){printf "%4d %4d\n", int(rand(4124))+1, int(rand(4124))+1}'

1046  261
  16 2900
2676  494
1137 2638
   6 3165
3141  584
  73 2299
3430   70
2056 2279
1343 3486
2688  274
2582 3591
 699  411

Added a bit of formatting

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