Hi,
On 01/09/2013 11:34 AM, Bernhard Voelker wrote:
On 01/09/2013 11:14 AM, Marcel Böhme wrote:
There are the following problems with the -w parameter of the seq tool:
[...]
Hmm, according to the TEXI manual, the FIRST number should also use
a fixed point decimal representation when the -w option is used:
[...]
But that leaves the question open if there's a reason for this.
I.e. if it's just documented behavior, a requirement of some
standard or due to compatibility reasons.
That seems to be just documented behavior, since seq is not standardized
by POSIX and other seq implementations ([1],[2],[3]) don't document
this. On the contrary, a common example is 'seq -w 0 .05 .1'.
This example works fine with GNU seq:
$ seq -w 0 .05 .1
0.00
0.05
0.10
Even when counting to negative numbers:
$ seq -w 0 -.05 -.1
00.00
-0.05
-0.10
Starting with a negative number with a fractional step size breaks equal
width for non-negative numbers:
$ seq -w -1 .5 1
-1.0
-0.5
0.0
0.5
1.0
$ seq --version | head -n1
seq (GNU coreutils) 8.13
HTH,
Erik
[1] http://man.cat-v.org/unix_8th/1/seq
[2] http://man.cat-v.org/plan_9/1/seq
[3] http://www.freebsd.org/cgi/man.cgi?query=seq&manpath=FreeBSD+9.0-RELEASE
