Very Computer

How do I sort a file which has floating point numbers in asc/descending order ?

e.g.

2.1
2.10
1.1
1.2.
2.5

Thanks in advance

Zul

$ sort -t. -k1n,1n -k2 << EOF
heredoc> 2.1
heredoc> 2.10
heredoc> 1.1
heredoc> 1.2.
heredoc> 2.5
heredoc> EOF
1.1
1.2.
2.1
2.10
2.5

This won't handle correctly 1e+6, negative numbers...

--
Stphane

-----------------

Quote:> How do I sort a file which has floating point numbers in asc/descending order ?

> e.g.

> 2.1
> 2.10
> 1.1
> 1.2.
> 2.5

sort -n your_file

That does integer sort, not floating point.  It will ignore everything
after the ".".

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Genuity Managed Services, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

---------------------

Quote:> >sort -n your_file

> That does integer sort, not floating point.  It will ignore everything
> after the ".".

Well, with GNU sort it worked fine for me.

Since this is comp.unix.shell, I think we should assume a generic Unix sort
command unless the OP specifies otherwise.  Or if a solution requires a
special version of a command, the poster should be specific.

--

Genuity Managed Services, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

Quote:

>$ sort -t. -k1n,1n -k2 << EOF
>heredoc> 2.1
>heredoc> 2.10
>heredoc> 1.1
>heredoc> 1.2.
>heredoc> 2.5
>heredoc> EOF
>1.1
>1.2.
>2.1
>2.10
>2.5

>This won't handle correctly 1e+6, negative numbers...

ie; floating point numbers. This is a FIXED-point sort

In all probability of course the OP used the term 'floating point'
when they meant 'fixed point' which seems to be a very common confusion
of terms.

byefornow
laura

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Actually, he probably meant "numbers with decimal points".  Fixed point and
floating point refer to ways that numbers are represented internally, not
how they're printed.

Fixed point also implies a specified maximum number of digits before and
after the decimal point.  E.g. in PL/I you might declare a variable to be
FIXED BIN(9,3), meaning 9 total bits with 3 bits of fraction, or FIXED
DEC(12,2) for 12 total digits with 2 after the decimal point.  Fixed point
is typically represented internally as a scaled integer.

--

Genuity Managed Services, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

  -g               compare according to general numerical value, imply -b

just using -g if available.

    perl -e 'print sort { $a <=> $b } <>' FILE

Peter

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