How can I modify my awk code to get rid of the divion by zero error message? If I run the script without an input file, it should return error message "Input file missing" but not divison by zero.
Code:
#!/bin/nawk -f
BEGIN {
if (NR == 0)
{print "Input file... (4 Replies)
I need to read the file divide 3 column with 2nd and run a modulus of 10 and check whether the remainder is zero or not if not print the entire line.
cat filename | awk '{ if ($3 / $2 % 10 != 0) print $0}'
Whats wrong with it ? (4 Replies)
vmstat|awk '{print $3}'|tail -1
returns 6250511, but what I need is 24416, which is 6250511 divided by 256.
Please advise.
Thank you so much (2 Replies)
hello
i try to divide 2 variables in order to get a percentage--that's why i'm not interested in integer division--but nothing seems to work
I think awk is suitable for this but i'm not quite sure how to use it..
any ideas?
here's what I want to do:
percentage = varA/varB
thank you (2 Replies)
Hi Friends,
I have an input file like this
cat input
chr1 100 200 1 2
chr1 120 130 na 1
chr1 140 160 1 na
chr1 170 180 na na
chr1 190 220 0 0
chr1 220 230 nd 1
chr2 330 400 1 nd
chr2 410 450 nd nd
chr3 500 700 1 1
I want to calculate the division of 4th and 5th columns. But, if... (3 Replies)
Hi Friends,
I don't understand why "a" is always being printed as zero, when I execute the following command.
awk '{if($6||$8||$10||$12==0)a=b=c=d=0;else (a=$5/$6);(b=$7/$8);(c=$9/$10);(d=$11/$12); {print... (6 Replies)
Hello,
How can I add a logic to awk to tell it to print 0 when encountering a division by zero attempted? Below is the code. Everything in the code works fine except the piece that I want to calculate read/write IO size. I take the kbr / rs and kbw / ws. There are times when the iostat data... (5 Replies)
Discussion started by: tommyd
5 Replies
LEARN ABOUT CENTOS
gccgo
GCCGO(1) GNU GCCGO(1)NAME
gccgo - A GCC-based compiler for the Go language
SYNOPSIS
gccgo [-c|-S]
[-g] [-pg] [-Olevel]
[-Idir...] [-Ldir...]
[-o outfile] infile...
Only the most useful options are listed here; see below for the remainder.
DESCRIPTION
The gccgo command is a frontend to gcc and supports many of the same options. This manual only documents the options specific to gccgo.
The gccgo command may be used to compile Go source code into an object file, link a collection of object files together, or do both in
sequence.
Go source code is compiled as packages. A package consists of one or more Go source files. All the files in a single package must be
compiled together, by passing all the files as arguments to gccgo. A single invocation of gccgo may only compile a single package.
One Go package may "import" a different Go package. The imported package must have already been compiled; gccgo will read the import data
directly from the compiled package. When this package is later linked, the compiled form of the package must be included in the link
command.
OPTIONS -Idir
Specify a directory to use when searching for an import package at compile time.
-Ldir
When linking, specify a library search directory, as with gcc.
-fgo-pkgpath=string
Set the package path to use. This sets the value returned by the PkgPath method of reflect.Type objects. It is also used for the
names of globally visible symbols. The argument to this option should normally be the string that will be used to import this package
after it has been installed; in other words, a pathname within the directories specified by the -I option.
-fgo-prefix=string
An alternative to -fgo-pkgpath. The argument will be combined with the package name from the source file to produce the package path.
If -fgo-pkgpath is used, -fgo-prefix will be ignored.
Go permits a single program to include more than one package with the same name in the "package" clause in the source file, though
obviously the two packages must be imported using different pathnames. In order for this to work with gccgo, either -fgo-pkgpath or
-fgo-prefix must be specified when compiling a package.
Using either -fgo-pkgpath or -fgo-prefix disables the special treatment of the "main" package and permits that package to be imported
like any other.
-fgo-relative-import-path=dir
A relative import is an import that starts with ./ or ../. If this option is used, gccgo will use dir as a prefix for the relative
import when searching for it.
-frequire-return-statement
-fno-require-return-statement
By default gccgo will warn about functions which have one or more return parameters but lack an explicit "return" statement. This
warning may be disabled using -fno-require-return-statement.
-fgo-check-divide-zero
Add explicit checks for division by zero. In Go a division (or modulos) by zero causes a panic. On Unix systems this is detected in
the runtime by catching the "SIGFPE" signal. Some processors, such as PowerPC, do not generate a SIGFPE on division by zero. Some
runtimes do not generate a signal that can be caught. On those systems, this option may be used. Or the checks may be removed via
-fno-go-check-divide-zero. This option is currently on by default, but in the future may be off by default on systems that do not
require it.
-fgo-check-divide-overflow
Add explicit checks for division overflow. For example, division overflow occurs when computing "INT_MIN / -1". In Go this should be
wrapped, to produce "INT_MIN". Some processors, such as x86, generate a trap on division overflow. On those systems, this option may
be used. Or the checks may be removed via -fno-go-check-divide-overflow. This option is currently on by default, but in the future
may be off by default on systems that do not require it.
SEE ALSO gpl(7), gfdl(7), fsf-funding(7), gcc(1) and the Info entries for gccgo and gcc.
COPYRIGHT
Copyright (c) 2010-2013 Free Software Foundation, Inc.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or
any later version published by the Free Software Foundation; with no Invariant Sections, the Front-Cover Texts being (a) (see below), and
with the Back-Cover Texts being (b) (see below). A copy of the license is included in the man page gfdl(7).
(a) The FSF's Front-Cover Text is:
A GNU Manual
(b) The FSF's Back-Cover Text is:
You have freedom to copy and modify this GNU Manual, like GNU
software. Copies published by the Free Software Foundation raise
funds for GNU development.
gcc-4.8.2 2014-01-20 GCCGO(1)
12-20-2010
