From: Serhiy Lisovenko <lisovenko.s@gmail.com>
To: gsl-discuss@sourceware.org
Subject: Not clear to understand :)
Date: Thu, 22 Nov 2007 11:33:00 -0000 [thread overview]
Message-ID: <1195731261.5477.14.camel@localhost.localdomain> (raw)
in file fit/linear.c
for (i = 0; i < n; i++)
{
m_x += (x[i * xstride] - m_x) / (i + 1.0);
m_y += (y[i * ystride] - m_y) / (i + 1.0);
}
and other same...
code equivalent to
for (i = 0; i < n; i++)
{
m_x +=x[i * xstride];
m_y +=y[i * ystride];
}
m_x/=(double)n;
m_y/=(double)n;
But the second code is more clear and some faster (no extra divisions).
next reply other threads:[~2007-11-22 11:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-22 11:33 Serhiy Lisovenko [this message]
2007-11-22 11:40 ` keith.briggs
2007-11-22 16:13 ` Patrick Alken
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1195731261.5477.14.camel@localhost.localdomain \
--to=lisovenko.s@gmail.com \
--cc=gsl-discuss@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).