Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

Annoying rounding issue in awk

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Annoying rounding issue in awk
# 1  
Old 08-26-2008
Annoying rounding issue in awk
Hello
I am getting this very annoying issue in awk:

Code:
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
# 2  
Old 08-26-2008
Code:
awk '{a=12825;b=a*1.25; printf "%5.2f\n", b}' test

# 3  
Old 08-26-2008
Edit: nevermind, I need to test more
# 4  
Old 08-26-2008
Alright

This doesn't work:

Code:
awk '{ a="12825";  
          b="16031.25"; 
          c=a*1.25; 
          if (b != c) printf "%5.2f\t%5.2f\n",b,c  
      }' test

Edit: and replacing the strings by numbers does work ???
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

[awk] rounding a float number?

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

2. Shell Programming and Scripting

How do I get out of the annoying > in bash???

Occasionally I make a mistake in my shell that results in there being a > for the prompt instead of the normal $. Today I accidentally left off a " in a sed command, sed s/\"//g" infile > outfile and then I get $ sed s/\"//g" infile > outfile > > I have never figured out how to get... (3 Replies)
Discussion started by: LMHmedchem
3 Replies

3. Shell Programming and Scripting

Variable value substitution issue with awk command issue

Hi All, I am using the below script which has awk command, but it is not returing the expected result. can some pls help me to correct the command. The below script sample.ksh should give the result if the value of last 4 digits in the variable NM matches with the variable value DAT. The... (7 Replies)
Discussion started by: G.K.K
7 Replies

4. Shell Programming and Scripting

printf (awk,perl,shell) float rounding issue

Hi guys, could someone throw some light on the following behaviour of printf (I'll start with info about the system and the tool/shell/interpreter versions)?: $ uname -a Linux linux-86if.site 3.1.0-1.2-desktop #1 SMP PREEMPT Thu Nov 3 14:45:45 UTC 2011 (187dde0) x86_64 x86_64 x86_64... (9 Replies)
Discussion started by: elixir_sinari
9 Replies

5. Shell Programming and Scripting

awk calculation automatically rounding off the output

I have some calculation in my script which is similar to the below example . I find that sometimes when using large decimal digits, the output gets automatically rounded off and it is affecting the program. I am not able to understand what is happening here.. awk '{ a=6.32498922 a1=6.324... (5 Replies)
Discussion started by: wanderingmind16
5 Replies

6. Shell Programming and Scripting

awk, floating point and rounding

I had a person bring an interesting problem to me that appears to involve some sort of rounding inside awk. I've verified this with awk and nawk on Solaris as well as with gawk 3.1.5 on a Linux box. The original code fragment he brought me was thus: for (index=0; index < 1; index=index+.1) ... (4 Replies)
Discussion started by: mmyer2
4 Replies

7. Shell Programming and Scripting

AWK rounding up numbers

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

Rounding issue with awk

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

9. Post Here to Contact Site Administrators and Moderators

Annoying tooltips

Hi Is there any way to turn off the (often ridiculously big) tooltips that are displayed when hovering over a topic in a topic list? It's driving me nuts. Thx. J (1 Reply)
Discussion started by: jgrogan
1 Replies

10. UNIX for Dummies Questions & Answers

a very annoying problem

hi i got fbsd here,when i try to start my X server as an user I got hte following error. Fatal server error: xf86OpenConsole: Server must be running with root permissions You should be usig Xwrapper to start the server or xdm. We strongly advise against making the server SUID root! But... (2 Replies)
Discussion started by: Stormpie
2 Replies
Login or Register to Ask a Question