Floating point does not always represent some numbers precisely
0.5 and 0.25 are simple binary fractions of 1, floating point will represent it perfectly as long as it has 2+ bits of fraction. For 32-bit floats, anything inside +/-2 million will work perfectly.
Computationally speaking, this is the most direct method: Multiply by 4, strip off decimals, divide by 4.
Last edited by Corona688; 09-26-2014 at 03:04 PM..
Hi All,
How we can handle decimals in (Float) in UNIX.
a=73
b=5
c=`expr a / b`
i am getting 14 but i need full 14.6 .
Can any one help me pls? (1 Reply)
I need to get 15% of the variable exer1 to be added to other exercises
so far, i've got
exer1=$1
aver=`expr $exer \* .15`
but i keep getting an error that an integer value was expected. Is there anyway around this? (1 Reply)
Hi,
I am trying to find if there is a way to convert regular decimal values to Paced decimal values. I tried to find a c program but I could get a Packed converted to regular decimal not the other way round.
If not unix please let me know if any other progrimming language I can use to do... (2 Replies)
Hello,
I want to run a loop with non-integer values (which I know I can't) so I've created a loop of integers and divided it by 10. However, these values are always rounded down to 1 significant figure. How do I get the script to keep and use the decimal value?
My script is as follows
#... (1 Reply)
Hello...
I am new to unix and I am wondering if in a C-shell script , Are we supposed to use only whole numbers........ for example..if a program needs to calculate the average of some numbers........
@ avg = (($1 +$2 + $3)/3)) is returning a whole number.........How can a decimal be achieved... (1 Reply)
Hi I have a large file in which I need to search for certain whole numbers and print the whole line. I'm currently trying this via command line using grep but grep is also matching the decimal values and i just want to return the matching whole numbers (the entire line)
Example
File
ddggg ... (7 Replies)
Hi All,
I would like to do the following in the shell script
561.76 to 562
I tried using this echo 'scale=0; 749 * 75 /100 ' | bc
but just returned only 561
Please help me . I appreciate your help
Thanks
rajeevm (13 Replies)
I am trying to get date to display decimal
Desired output 1350386096256.12
I know this can be done with printf, but are not able to make it work.
I have tested this and many otherprintf "%.2f" $(($(date +%s%N)/1000000)) (8 Replies)
Hello,
i'm new in python. Consider that i have this function that read me some data from a serial :
def GetData():
line = open(serialx).read()
hash = line.find("#")
when = line
count = line
# print when, count, line
return (float(when), int(count))
it gives me the result... (2 Replies)
Hi Gurus,
I have below sample file, I need find the line which 2rd field has more than 2 decimals.
in sample file, I need to find xyz, 123456.789
abc, 1234.45, def
xyz, 123456.789, xxx
bce, 1234.34, xxx
thanks in advance (13 Replies)
Discussion started by: ken6503
13 Replies
LEARN ABOUT REDHAT
bigrat
bigrat(3pm) Perl Programmers Reference Guide bigrat(3pm)NAME
bigrat - Transparent BigNumber/BigRationale support for Perl
SYNOPSIS
use bigrat;
$x = 2 + 4.5,"
"; # BigFloat 6.5
print 1/3 + 1/4,"
"; # produces 7/12
DESCRIPTION
All operators (inlcuding basic math operations) are overloaded. Integer and floating-point constants are created as proper BigInts or
BigFloats, respectively.
Other than bignum, this module upgrades to Math::BigRat, meaning that instead of 2.5 you will get 2+1/2 as output.
MODULES USED
"bigrat" is just a thin wrapper around various modules of the Math::BigInt family. Think of it as the head of the family, who runs the
shop, and orders the others to do the work.
The following modules are currently used by bignum:
Math::BigInt::Lite (for speed, and only if it is loadable)
Math::BigInt
Math::BigFloat
Math::BigRat
MATH LIBRARY
Math with the numbers is done (by default) by a module called Math::BigInt::Calc. This is equivalent to saying:
use bigrat lib => 'Calc';
You can change this by using:
use bigrat lib => 'BitVect';
The following would first try to find Math::BigInt::Foo, then Math::BigInt::Bar, and when this also fails, revert to Math::BigInt::Calc:
use bigrat lib => 'Foo,Math::BigInt::Bar';
Please see respective module documentation for further details.
SIGN
The sign is either '+', '-', 'NaN', '+inf' or '-inf' and stored seperately.
A sign of 'NaN' is used to represent the result when input arguments are not numbers or as a result of 0/0. '+inf' and '-inf' represent
plus respectively minus infinity. You will get '+inf' when dividing a positive number by 0, and '-inf' when dividing any negative number by
0.
METHODS
Since all numbers are not objects, you can use all functions that are part of the BigInt or BigFloat API. It is wise to use only the bxxx()
notation, and not the fxxx() notation, though. This makes you independed on the fact that the underlying object might morph into a differ-
ent class than BigFloat.
EXAMPLES
perl -Mbigrat -le 'print sqrt(33)'
perl -Mbigrat -le 'print 2*255'
perl -Mbigrat -le 'print 4.5+2*255'
perl -Mbigrat -le 'print 3/7 + 5/7 + 8/3'
perl -Mbigrat -le 'print 12->is_odd()';
LICENSE
This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
Especially bignum.
Math::BigFloat, Math::BigInt, Math::BigRat and Math::Big as well as Math::BigInt::BitVect, Math::BigInt::Pari and Math::BigInt::GMP.
AUTHORS
(C) by Tels <http://bloodgate.com/> in early 2002.
perl v5.8.0 2002-06-01 bigrat(3pm)