What drl is telling you:
1. floating point numbers represent values correctly only to a certain level of precision
so the = part of a comparison does not work like you would think.
2. awk uses double precision floating point number for aritmetic operations, so #1 applies.
3. in /usr/include/math.h you will find macros defined:
these are the standard way of doing floating point comparisons on your system. Notice there is no "equal()", for reasons just explained.
i would like to enter (user input) a bunch of numbers seperated by space:
10 15 20 25
and use awk to print out any lines in a file that have matching numbers
so output is:
22 44 66 55 (10) 77 (20)
(numbers 10 and 20 matched for example)
is this possible in awk . im using gawk for... (5 Replies)
Hai,
Can you please guide me, to compare the floating point numbers.
Eg.
If
then
echo "value1 is grater "
fi
This code is not working properly when i excuted with floating values or real numbers (13 Replies)
Hi everyone,
I need to compare 2 big Floating/Real numbers in a script.
After the comparission it is showing worng values in my script.
echo "Enter value1"
read value1
echo "Enter value2"
read value2
Result=`echo "if($value1 > $value2) 1" | bc`
if ; then
echo "$value1 is... (4 Replies)
if the column1 and 2 in both files has same key (for example "a" and "a1") compare each first key value(a1 of a) of input2 (for example 1-4 or 65-69 not 70-100 or 44-40 etc) with all the values in input1.
if the range of first key value in input2 is outof range in input1 values named it as out... (54 Replies)
I am begining to learn bourne shell and as a practice I have written a script which when given the purchase price and percentage of discount calculates the savings.
I somehow cannot figure out why my script fails to do arthimatic calculation on real numbers.
Could anyone look at the script... (5 Replies)
Hello to all,
I hope some awk guru could help me.
I have 2 input files:
File1: Is the complete database
File2: Contains some numbers which I want to compare
File1:
"NUMBERKEY","SERVICENAME","PARAMETERNAME","PARAMETERVALUE","ALTERNATENUMBERKEY"... (9 Replies)
Hi Experts,
I am finding difficulty to get exact match:
file
OPERATING_SYSTEM=HP-UX
LOOPBACK_ADDRESS=127.0.0.1
INTERFACE_NAME="lan3"
IP_ADDRESS="10.53.52.241"
SUBNET_MASK="255.255.255.192"
BROADCAST_ADDRESS=""
INTERFACE_STATE=""
DHCP_ENABLE=0
INTERFACE_NAME="lan3:1"... (6 Replies)
Hi,
I'm trying to match a filename that could be called anything from vout001 to vout252 and was trying to do a small test but I'm not getting the result I thought I would..
Can some one tell me what I'm doing wrong?
*****@********>echo $mynumber ... (4 Replies)
I am trying to create a cronjob that will run on startup that will look at a list.txt file to see if there is a later version of a database using database.txt as the source. The matching lines are written to output.
$1 in database.txt will be in list.txt as a partial match. $2 of database.txt... (2 Replies)
In the awk below I am trying to output those lines that Match between file1 and file2, those Missing in file1, and those missing in file2. Using each $1,$2,$4,$5 value as a key to match on, that is if those 4 fields are found in both files the match, but if those 4 fields are not found then missing... (0 Replies)
Discussion started by: cmccabe
0 Replies
LEARN ABOUT OSX
isunordered
ISGREATER(3) BSD Library Functions Manual ISGREATER(3)NAME
isgreater, isgreaterequal, isless, islessequal, islessgreater, isunordered -- compare two floating-point numbers
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <math.h>
int
isgreater(real-floating x, real-floating y);
int
isgreaterequal(real-floating x, real-floating y);
int
isless(real-floating x, real-floating y);
int
islessequal(real-floating x, real-floating y);
int
islessgreater(real-floating x, real-floating y);
int
isunordered(real-floating x, real-floating y);
DESCRIPTION
Each of the macros isgreater(), isgreaterequal(), isless(), islessequal(), and islessgreater() takes arguments x and y and returns a non-zero
value if and only if its nominal relation on x and y is true. These macros always return zero if either argument is not a number (NaN), but
unlike the corresponding C operators, they never raise a floating point exception.
The isunordered() macro takes arguments x and y, returning non-zero if either x or y is NaN. For any pair of floating-point values, one of
the relationships (less, greater, equal, unordered) holds.
SEE ALSO fpclassify(3), math(3), signbit(3)STANDARDS
The isgreater(), isgreaterequal(), isless(), islessequal(), islessgreater(), and isunordered() macros conform to ISO/IEC 9899:1999
(``ISO C99'').
BSD December 1, 2008 BSD