AWK subtraction in multiple columns
Hi there,
Can not get the following:
input: 34523 934
9485 3847
394 3847
3456 9384
awk 'NR==1 {for (i = 1; i <= NF; i++) {n=$i; next}; {n-=$i} END {print n}' input
output: 21188 first column only,... (2 Replies)
Hi Guyz
The 1st column of the input file has repeated keys like x,y and z.
The ist task is if the 1st column has unique key (say x) and then need to consider 4th column, if it is + symbol then subtract 2nd column value with 3rd column value (we will get 2(10-8)) or if it is - symbol subtract 3rd... (3 Replies)
I can't seem to get this to work.
I can reformat the date field if it's the first field (and only field) in the file:
However, I get a syntax error when the date field is the second field (or has any other columns following):
I can use a ";" but then it puts each column on separate... (8 Replies)
Hi
I have 2 files as below
File 1
Chr Start End
chr1 120 130
chr1 140 150
chr2 130 140
File2
Chr Start End Value
chr1 121 128 ABC
chr1 144 149 XYZ
chr2 120 129 PQR
I would like to compare these files using awk; specifically if column 1 of file1 is equal to column 1 of file2... (7 Replies)
Hi, I'm trying to use awk arrays to compare values across two files based on multiple columns. I've attempted to load file 2 into an array and compare with values in file 1, but success has been absent. If anyone has any suggestions (and I'm not even sure if my script so far is on the right lines)... (4 Replies)
Hi all,
I have two files as below. I need to compare field 2 of file 1 against field 1 of file 2 and field 5 of file 1 against filed 2 of file 2. If both matches , then create a result file 1 with first file data and if not matches , then create file with first fie data. Please help me in... (12 Replies)
Hi guys,
I have hundreds file like this, here I only show two of them:
file 1
feco4_s_BB95.log ZE_1=-1717.5206260
feco4_t_BB95.log ZE_1=-1717.5169250
feco5_s_BB95.log ZE_1=-1830.9322060... (11 Replies)
Hi forum members,
I'm trying to get an average of multiple columns in a csv file using awk. A small example of my input data is as follows:
cu,u3o8,au,ag
-9,20,-9,3.6
0.005,30,-9,-9
0.005,50,10,3.44
0.021,-9,8,3.35
The following code seems to do most of what I want
gawk -F","... (6 Replies)
Discussion started by: theflamingmoe
6 Replies
LEARN ABOUT DEBIAN
tree::simple::visitor::postordertraversal
Tree::Simple::Visitor::PostOrderTraversal(3pm) User Contributed Perl Documentation Tree::Simple::Visitor::PostOrderTraversal(3pm)NAME
Tree::Simple::Visitor::PostOrderTraversal - A Visitor for post-order traversal a Tree::Simple hierarchy
SYNOPSIS
use Tree::Simple::Visitor::PostOrderTraversal;
# create an visitor
my $visitor = Tree::Simple::Visitor::PostOrderTraversal->new();
# pass our visitor to the tree
$tree->accept($visitor);
# print our results
print join ", " => $visitor->getResults();
# this will print this:
# 1.1.1 1.1 1.2 1 2.1 2 3.1 3
# assuming your tree is like this:
# 1
# 1.1
# 1.1.1
# 1.2
# 2
# 2.1
# 3
# 3.1
DESCRIPTION
Post-order traversal is a variation of the depth-first traversal in which the sub-tree's are processed before the parent. It is another
alternative to Tree::Simple's "traverse" method which implements a depth-first, pre-order traversal.
METHODS
new There are no arguments to the constructor the object will be in its default state. You can use the "setNodeFilter" method to customize
its behavior.
includeTrunk ($boolean)
Based upon the value of $boolean, this will tell the visitor to include the trunk of the tree in the traversal as well.
setNodeFilter ($filter_function)
This method accepts a CODE reference as its $filter_function argument and throws an exception if it is not a code reference. This code
reference is used to filter the tree nodes as they are collected. This can be used to customize output, or to gather specific
information from a more complex tree node. The filter function should accept a single argument, which is the current Tree::Simple
object.
visit ($tree)
This is the method that is used by Tree::Simple's "accept" method. It can also be used on its own, it requires the $tree argument to be
a Tree::Simple object (or derived from a Tree::Simple object), and will throw and exception otherwise.
getResults
This method returns the accumulated results of the application of the node filter to the tree.
BUGS
None that I am aware of. Of course, if you find a bug, let me know, and I will be sure to fix it.
CODE COVERAGE
See the CODE COVERAGE section in Tree::Simple::VisitorFactory for more inforamtion.
SEE ALSO
These Visitor classes are all subclasses of Tree::Simple::Visitor, which can be found in the Tree::Simple module, you should refer to that
module for more information.
AUTHOR
stevan little, <stevan@iinteractive.com>
COPYRIGHT AND LICENSE
Copyright 2004, 2005 by Infinity Interactive, Inc.
<http://www.iinteractive.com>
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.10.1 2005-07-14 Tree::Simple::Visitor::PostOrderTraversal(3pm)