10-14-2012
Quote:
Originally Posted by
elixir_sinari
Only the printf builtin in ksh93t+ seems to give me what I expect (4.5 being rounded to 5 and 5.5 to 6).
Why so?
Because floating point doesn't work that way. It doesn't count in nice 1.0 jumps, and forcing it to do so removes a lot of the point of having a floating point -- both figuratively and literally.
It's not really a missing feature, anyway. Add 0.5 before you print the decimal and that gets you rounding.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
HI!
What is the notation which correspond to C's
doubleandfloatin Perl??
Please tell me.
Thanks.
Well what I want to do is, for example, calculatingsqrt(2)in two way: float and double. (5 Replies)
Discussion started by: Euler04
5 Replies
2. UNIX for Dummies Questions & Answers
Hello
I am getting this very annoying issue in awk:
awk '{a=12825;b=a*1.25; print b}' test
16031.2
Thing is the multiplication result is wrong... Result should be 16031.25.
I think the issue only happens on bigger numbers.
What can I do to get passed this?
Thanks by advance (3 Replies)
Discussion started by: Indalecio
3 Replies
3. Shell Programming and Scripting
Hi Guys,
I am generating a statistical report , below is the snippet of the code :
Now, $nSlices stands for the time duration,meaning,the statistics will be displayed for that particular time duration. Trouble is, for certain values of $totalTime (which is the end time - start time ), i... (9 Replies)
Discussion started by: rdlover
9 Replies
4. Shell Programming and Scripting
Hi
I'm using awk to manipulate the data in the 6th field of the file xxx_yyy.hrv.
The sample data that is available in this field is given below
220731.7100000000000000
When i tried using this command
cat xxx_yyy.hrv | awk '{printf("%23.16f\n",$6*-1)}'
I get the output as... (4 Replies)
Discussion started by: angelarosh
4 Replies
5. Shell Programming and Scripting
Hi Friends,
I am trying to round following number.
0.07435000
echo "0.07435000"|awk '{printf "%s\n",$1*100}'|awk '{printf "%.2f\n",$1}'
It returns: 7.435
It should return: 7.44
Any suggestion please?
Thanks,
Prashant (2 Replies)
Discussion started by: ppat7046
2 Replies
6. Shell Programming and Scripting
Is there a way I can round time in perl to the nearest five minutes?
For example if I have log giving the following time stamps
23,52,30 it would rounded up to 23,55,00
and
23,50,01 would be rounded to 23,50,00 (3 Replies)
Discussion started by: borderblaster
3 Replies
7. Shell Programming and Scripting
Hi,
I have managed to round up numbers by using the following command:
echo "5.54" | awk '{printf "%.0f\n", $1}'
result
6
How can I round up all the numbers in a column in a file and print the lines with the new calculated totals?
Thanks, (3 Replies)
Discussion started by: keenboy100
3 Replies
8. Shell Programming and Scripting
It seems that perl sprintf uses the round-to-even method:
foreach my $i ( 0.5, 1.5, 2.5, 3.5 ) {
printf "$i -> %.0f\n", $i;
}
__END__
0.5 -> 0
1.5 -> 2
2.5 -> 2
3.5 -> 4
4.5 -> 4
Where we probably wants to use round-half-up, i.e. output should be as below:
0.5 -> 1
1.5 -> 2... (8 Replies)
Discussion started by: ganapati
8 Replies
9. UNIX for Dummies Questions & Answers
Hello,
I am using bash shell on Linux OS, May i please know why is it rounding for big numbers but not for others, is there a workaround to print it as it is with out round off?
printf '%'\''.2f\n' 9999999999999999999.99
10,000,000,000,000,000,000.00
printf '%'\''.2f\n' 99999999999999.99... (1 Reply)
Discussion started by: Ariean
1 Replies
10. Shell Programming and Scripting
Heyas
Trying to calculate the total size of a file by reading its bitrate.
Code snippet:
fs_expected() { #
# Returns the expected filesize in bytes
#
pr_str() {
ff=$(cat $TMP.info)
d="${ff#*bitrate: }"
echo "${d%%,*}" | $AWK '{print $1}' | head -n 1
}
t_BYTERATE=$((... (9 Replies)
Discussion started by: sea
9 Replies
fenv(5) File Formats Manual fenv(5)
NAME
fenv - floating-point environment macros and functions
SYNOPSIS
DESCRIPTION
The header declares two types and several macros and functions to provide access to the floating-point environment. The floating-point
environment refers collectively to the floating-point status flags and control modes. A floating-point status flag is a system variable
whose value is set (but never cleared) when a floating-point exception is raised, which occurs as a side effect of exceptional floating-
point arithmetic to provide auxiliary information. A floating-point control mode is a system variable whose value may be set by the user
to affect the subsequent behavior of floating-point arithmetic; on HP 9000 and HP Integrity servers the control modes include the rounding
direction mode, the gradual/flush-to-zero underflow mode, and the trap enables.
For HP-UX 11i v3 September 2008 Update (and later) for Integrity servers, the floating-point environment also includes the rounding direc-
tion mode for decimal floating point, which is independent of the rounding direction mode for binary floating point. Both binary and deci-
mal floating point use the same status flags.
The following types are defined:
Represents the entire floating-point environment.
Represents the floating-point exception flags collectively.
The following macros represent the floating-point status flags. They are defined as integral constant expressions with values such that
bitwise ORs of all combinations of the macros result in distinct values.
The inexact exception.
The division-by-zero exception.
The underflow exception.
The overflow exception.
The invalid operation exception.
The bitwise OR of all exception macros.
The following macros represent the rounding direction modes for binary floating point. They are defined as integral constant expressions
with distinct nonnegative values.
The round-to-nearest rounding direction mode.
The round-toward-positive-infinity rounding direction mode.
The round-toward-negative-infinity rounding direction mode.
The round-toward-zero rounding direction mode.
The following macro is defined as a pointer to const-qualified
The default floating-point environment.
To the ISO/IEC C99 specified facilities, the HP implementation adds four HP-specific functions: and
For HP-UX 11i v3 September 2008 Update (and later) for Integrity servers, included in a compilation where has been defined, this file
defines the following macros representing the rounding direction modes for decimal floating point. They are for use with the and functions.
They are defined as integral constant expressions with distinct nonnegative values.
The round-to-nearest decimal rounding direction mode with ties
(half-way cases) to even.
The round-toward-positive-infinity decimal rounding direction mode.
The round-toward-negative-infinity decimal rounding direction mode.
The round-toward-zero decimal rounding direction mode.
The round-to-nearest decimal rounding direction mode with ties
(half-way cases) away from zero.
To use any of the types or macros for decimal floating point, define either with a compile option, or with
in the source file before inclusion of
FILES
SEE ALSO
fe_dec_getround(3M), fe_dec_setround(3M), feclearexcept(3M), fegetexceptflag(3M), feraiseexcept(3M), fesetexceptflag(3M), fetestexcept(3M),
fegetround(3M), fesetround(3M), fegetenv(3M), feholdexcept(3M), fesetenv(3M), feupdateenv(3M), fegetflushtozero(3M), fesetflushtozero(3M),
fegettrapenable(3M), fesettrapenable(3M), math(5).
STANDARDS CONFORMANCE
: ISO/IEC C99 (including Annex F, "IEC 60559 floating-point arithmetic"), ISO/IEC TR 24732
fenv(5)