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Full Discussion: Randomly selecting sequences and generating specific output files
Top Forums Shell Programming and Scripting Randomly selecting sequences and generating specific output files Post 302786141 by Scrutinizer on Wednesday 27th of March 2013 02:22:17 AM
Old 03-27-2013
Here is a start in awk you could try. The first file is read twice solely to determine the number of records..

Code:
awk -v s=3 -v iter=1 '
  NR==FNR { 
    next 
  }
  FNR==1 {
    if(!set) {
      srand();
      n=NR-1
      for(i=1; i<=s; i++) {
        line=0
        while(!line || line in A) line=int(rand()*n)+1
        A[line]
      }
      set=1
    }
    close(f)
    f=FILENAME ".out" iter
  } 
  FNR in A {
    print > f
  }
' infile1 infile1 infile2

You could embed it in a shell loop that increases the iter variable ( -v iter="$loopvar" )


--

Quote:
Originally Posted by Don Cragun
In you output samples, the lines in each set of output files are all in the order in which they appeared in the input files. Is that a requirement for your output, or is it just a coincidence in the random numbers used for your example?

With truly random numbers, the output could contain more than one copy of some output lines. Is it a requirement that the output lines be unique?
Isn't that a matter of sampling with/without replacement?
Last edited by Scrutinizer; 03-28-2013 at 11:13 AM.. Reason: Added parentheses to rand and stand, to make it work in gawk
 

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LEARN ABOUT SUSE

gtk2::treestore

Gtk2::TreeStore(3)					User Contributed Perl Documentation					Gtk2::TreeStore(3)

NAME

       Gtk2::TreeStore

HIERARCHY

	 Glib::Object
	 +----Gtk2::TreeStore

INTERFACES

	 Gtk2::TreeModel
	 Gtk2::TreeDragSource
	 Gtk2::TreeDragDest
	 Gtk2::TreeSortable
	 Gtk2::Buildable

METHODS

   treestore = Gtk2::TreeStore->new (...)
       o   ... (list) of strings, package names

   treeiter = $tree_store->append ($parent)
       o   $parent (Gtk2::TreeIter or undef)

   $tree_store->clear
   $tree_store->set_column_types (...)
       o   ... (list) of strings, package names

   $tree_store->set ($iter, $col1, $val1, ...)
       o   $iter (Gtk2::TreeIter)

       o   $col1 (integer) the first column number

       o   $val1 (scalar) the first value

       o   ... (list) pairs of columns and values

   treeiter = $tree_store->insert ($parent, $position)
       o   $parent (Gtk2::TreeIter or undef)

       o   $position (integer)

   treeiter = $tree_store->insert_after ($parent, $sibling)
       o   $parent (Gtk2::TreeIter or undef)

       o   $sibling (Gtk2::TreeIter or undef)

   treeiter = $tree_store->insert_before ($parent, $sibling)
       o   $parent (Gtk2::TreeIter or undef)

       o   $sibling (Gtk2::TreeIter or undef)

   treeiter = $tree_store->insert_with_values ($parent, $position, ...)
       o   $parent (Gtk2::TreeIter or undef)

       o   $position (integer) position to insert the new row

       o   ... (list) pairs of column numbers and values

       Like doing insert followed by set, except that insert_with_values emits only the row-inserted signal, rather than row-inserted, row-
       changed, and, if the store is sorted, rows-reordered as in the multiple-operation case.	Since emitting the rows-reordered signal
       repeatedly can affect the performance of the program, insert_with_values should generally be preferred when inserting rows in a sorted tree
       store.

       Since: gtk+ 2.10

   boolean = $tree_store->is_ancestor ($iter, $descendant)
       o   $iter (Gtk2::TreeIter)

       o   $descendant (Gtk2::TreeIter)

   integer = $tree_store->iter_depth ($iter)
       o   $iter (Gtk2::TreeIter)

   boolean = $tree_store->iter_is_valid ($iter)
       o   $iter (Gtk2::TreeIter)

       Since: gtk+ 2.2

   $tree_store->move_after ($iter, $position)
       o   $iter (Gtk2::TreeIter)

       o   $position (Gtk2::TreeIter or undef)

       Since: gtk+ 2.2

   $tree_store->move_before ($iter, $position)
       o   $iter (Gtk2::TreeIter)

       o   $position (Gtk2::TreeIter or undef)

       Since: gtk+ 2.2

   treeiter = $tree_store->prepend ($parent)
       o   $parent (Gtk2::TreeIter or undef)

   boolean = $tree_store->remove ($iter)
       o   $iter (Gtk2::TreeIter)

   $tree_store->reorder ($parent, ...)
       o   $parent (Gtk2::TreeIter or undef)

       o   ... (list) of integer's, the new_order

       Since: gtk+ 2.2

   $tree_store->swap ($a, $b)
       o   $a (Gtk2::TreeIter)

       o   $b (Gtk2::TreeIter)

       Since: gtk+ 2.2

   $tree_store->set_value ($iter, $col1, $val1, ...)
       o   $iter (Gtk2::TreeIter)

       o   $col1 (integer) the first column number

       o   $val1 (scalar) the first value

       o   ... (list) pairs of columns and values

       Alias for Gtk2::TreeStore::set().

SEE ALSO

       Gtk2, Glib::Object

COPYRIGHT

       Copyright (C) 2003-2008 by the gtk2-perl team.

       This software is licensed under the LGPL.  See Gtk2 for a full notice.

perl v5.12.1							    2010-07-05							Gtk2::TreeStore(3)
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