Path: csiph.com!usenet.pasdenom.info!gegeweb.org!de-l.enfer-du-nord.net!feeder2.enfer-du-nord.net!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail From: =?ISO-8859-1?Q?Hans-Bernhard_Br=F6ker?= Newsgroups: comp.graphics.apps.gnuplot Subject: Re: Correlation coefficient Date: Sat, 14 Jul 2012 18:29:43 +0200 Lines: 17 Message-ID: References: <447e021d-67d8-4a1d-9268-67ddc983dc2a@j25g2000vbr.googlegroups.com> <95hkj6Fi8eU1@mid.dfncis.de> <5f9b9ef2-4e51-4c6d-8951-83feb1b5e774@c20g2000vbv.googlegroups.com> <95mjm9F19cU1@mid.dfncis.de> <0fb8d538-97d6-455c-9f86-f8ecaf7a4583@b1g2000yql.googlegroups.com> <95q4sdF9m0U1@mid.dfncis.de> <9012ddb5-61bd-43cd-a54b-364afbbbf9d8@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Trace: news.dfncis.de ox7N0W4VELgZlucIHzn3fASwbBrBTQ3jJ649Q7JdHB9gB9QrOu5nauEyMqqMXwhCmJY3VCEkaH Cancel-Lock: sha1:qjlvMdlHwp0ZLiGDmGSOzRQxKm4= User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:13.0) Gecko/20120604 Thunderbird/13.0 In-Reply-To: <9012ddb5-61bd-43cd-a54b-364afbbbf9d8@googlegroups.com> Xref: csiph.com comp.graphics.apps.gnuplot:1270 On 14.07.2012 17:37, alexis.paz@gmail.com wrote: > El martes, 14 de junio de 2011 19:16:20 UTC-3, Hans-Bernhard Bröker > escribió: >> The real issue is whether that r_xy is all that useful as you seem >> to think it is. Maybe you'ld be be better just not computing >> it at all? You're aware that you're replying to a post that's over one year old, right? > I think the problem is how compare the "goodness of fit" between two > curves. The chisqure from the gnuplot depends on the magnitude on the > axis. Only if you neglect to specify properly scaled error bars --- if you're going to be that negligent, you shouldn't be expecting serious results from _any_ mathematical tool.