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Full Discussion: README: Factorial quick chart with sed & bc:
Top Forums Shell Programming and Scripting README: Factorial quick chart with sed & bc: Post 302766965 by rveri on Wednesday 6th of February 2013 02:08:07 AM
Old 02-06-2013
README: Factorial quick chart with sed & bc:
Hi all,
While doing some checks I found a kind of interesting arithmetic factorial chart with sed, sharing this may be simple but thought to share,



Code:
# n=20;for i in `seq $n`;do printf "`seq $i|xargs|sed 's/ /*/g'`= ";echo "`seq $i|xargs|sed 's/ /*/g'`"| bc;done
1= 1
1*2= 2
1*2*3= 6
1*2*3*4= 24
1*2*3*4*5= 120
1*2*3*4*5*6= 720
1*2*3*4*5*6*7= 5040
1*2*3*4*5*6*7*8= 40320
1*2*3*4*5*6*7*8*9= 362880
1*2*3*4*5*6*7*8*9*10= 3628800
1*2*3*4*5*6*7*8*9*10*11= 39916800
1*2*3*4*5*6*7*8*9*10*11*12= 479001600
1*2*3*4*5*6*7*8*9*10*11*12*13= 6227020800
1*2*3*4*5*6*7*8*9*10*11*12*13*14= 87178291200
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15= 1307674368000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16= 20922789888000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17= 355687428096000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18= 6402373705728000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19= 121645100408832000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*20= 2432902008176640000
# n=20;for i in `seq $n -1 1`;do printf "`seq $i|xargs|sed 's/ /*/g'`= ";echo "`seq $i|xargs|sed 's/ /*/g'`"| bc;done
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19*20= 2432902008176640000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18*19= 121645100408832000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17*18= 6402373705728000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16*17= 355687428096000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15*16= 20922789888000
1*2*3*4*5*6*7*8*9*10*11*12*13*14*15= 1307674368000
1*2*3*4*5*6*7*8*9*10*11*12*13*14= 87178291200
1*2*3*4*5*6*7*8*9*10*11*12*13= 6227020800
1*2*3*4*5*6*7*8*9*10*11*12= 479001600
1*2*3*4*5*6*7*8*9*10*11= 39916800
1*2*3*4*5*6*7*8*9*10= 3628800
1*2*3*4*5*6*7*8*9= 362880
1*2*3*4*5*6*7*8= 40320
1*2*3*4*5*6*7= 5040
1*2*3*4*5*6= 720
1*2*3*4*5= 120
1*2*3*4= 24
1*2*3= 6
1*2= 2
1= 1
#

Just replace the value of n , to the desired factorial and it ll construct the chart. Below is an example of factorial 20 's chart:
Code:
n=20;for i in `seq $n`;do printf "`seq $i|xargs|sed 's/ /*/g'`= ";echo "`seq $i|xargs|sed 's/ /*/g'`"| bc;done


Enjoy!. Have fun!.
Last edited by rveri; 02-06-2013 at 03:13 AM..
These 2 Users Gave Thanks to rveri For This Post:
Neo Scrutinizer
 

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LEARN ABOUT DEBIAN

bio::factory::sequencefactoryi

Bio::Factory::SequenceFactoryI(3pm)			User Contributed Perl Documentation		       Bio::Factory::SequenceFactoryI(3pm)

NAME

       Bio::Factory::SequenceFactoryI - This interface allows for generic building of sequences in factories which create sequences (like SeqIO)

SYNOPSIS

       # do not use this object directly it is an interface # get a Bio::Factory::SequenceFactoryI object like

	   use Bio::Seq::SeqFactory;
	   my $seqbuilder = Bio::Seq::SeqFactory->new('-type' => 'Bio::PrimarySeq');

	   my $seq = $seqbuilder->create(-seq => 'ACTGAT',
					 -display_id => 'exampleseq');

	   print "seq is a ", ref($seq), "
";

DESCRIPTION

       A generic way to build Sequence objects via a pluggable factory.  This reduces the amount of code that looks like

	 if( $type  eq 'Bio::PrimarySeq' ) { ... }
	 elsif( $type eq 'Bio::Seq::RichSeq' ) { ... }

FEEDBACK

   Mailing Lists
       User feedback is an integral part of the evolution of this and other Bioperl modules. Send your comments and suggestions preferably to the
       Bioperl mailing list.  Your participation is much appreciated.

	 bioperl-l@bioperl.org			- General discussion
	 http://bioperl.org/wiki/Mailing_lists	- About the mailing lists

   Support
       Please direct usage questions or support issues to the mailing list:

       bioperl-l@bioperl.org

       rather than to the module maintainer directly. Many experienced and reponsive experts will be able look at the problem and quickly address
       it. Please include a thorough description of the problem with code and data examples if at all possible.

   Reporting Bugs
       Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their resolution. Bug reports can be submitted via the
       web:

	 https://redmine.open-bio.org/projects/bioperl/

AUTHOR - Jason Stajich
       Email jason-at-bioperl.org

APPENDIX

       The rest of the documentation details each of the object methods.  Internal methods are usually preceded with a _

   create
	Title	: create
	Usage	: my $seq = $seqbuilder->create(-seq => 'CAGT',
						-id => 'name');
	Function: Instantiates new Bio::PrimarySeqI (or one of its child classes)
		  This object allows us to genericize the instantiation of sequence
		  objects.
	Returns : Bio::PrimarySeqI
	Args	: initialization parameters specific to the type of sequence
		  object we want.  Typically
		  -seq	      => $str,
		  -display_id => $name

perl v5.14.2							    2012-03-02				       Bio::Factory::SequenceFactoryI(3pm)
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