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	<title>Comments on: MBH98 Source Code: Cross-validation R2</title>
	<atom:link href="http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/feed/" rel="self" type="application/rss+xml" />
	<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/</link>
	<description>by Steve McIntyre</description>
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	<item>
		<title>By: Shollenberger&#8217;s Technical Review of Mann&#8217;s recent book &#124; Watts Up With That?</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-328801</link>
		<dc:creator><![CDATA[Shollenberger&#8217;s Technical Review of Mann&#8217;s recent book &#124; Watts Up With That?]]></dc:creator>
		<pubDate>Sun, 11 Mar 2012 16:44:49 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-328801</guid>
		<description><![CDATA[[...] criticized Mann for not publishing r2 verification scores which were practically 0 (very bad). Mann calculated these scores, but he never published the adverse results. When a committee formed by the United [...]]]></description>
		<content:encoded><![CDATA[<p>[...] criticized Mann for not publishing r2 verification scores which were practically 0 (very bad). Mann calculated these scores, but he never published the adverse results. When a committee formed by the United [...]</p>
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		<title>By: TCO</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34783</link>
		<dc:creator><![CDATA[TCO]]></dc:creator>
		<pubDate>Wed, 21 Sep 2005 16:47:52 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34783</guid>
		<description><![CDATA[Failure to disclose the adverse (or at least &quot;adverse looking&quot; Rsq) is a big ethical lapse.  As it is now, the best Mann can do is say that he withheld it to &quot;prevent confusion&quot;.  But that sort of &quot;confusion&quot; (debate over potential limitations) is exactly what science dictates.  sHare the potentially adverse results and let the debate go forward.  Don&#039;t hide things.

Mann&#039;s actions are 180 degrees from Richard Feynman&#039;s dictates on scientific ethics.]]></description>
		<content:encoded><![CDATA[<p>Failure to disclose the adverse (or at least &#8220;adverse looking&#8221; Rsq) is a big ethical lapse.  As it is now, the best Mann can do is say that he withheld it to &#8220;prevent confusion&#8221;.  But that sort of &#8220;confusion&#8221; (debate over potential limitations) is exactly what science dictates.  sHare the potentially adverse results and let the debate go forward.  Don&#8217;t hide things.</p>
<p>Mann&#8217;s actions are 180 degrees from Richard Feynman&#8217;s dictates on scientific ethics.</p>
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		<title>By: Dave Dardinger</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34782</link>
		<dc:creator><![CDATA[Dave Dardinger]]></dc:creator>
		<pubDate>Sun, 24 Jul 2005 14:07:14 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34782</guid>
		<description><![CDATA[I think it was Cheer that used &quot;whiter than white&quot; in the US.

I try to use the &quot;tit for 2 tats&quot; style of reaction to ad homs, but since few people are willing to only insult me once, after a bit people have difficulty telling who started it.  Of course this site has a bit different focus than a more general site so  I tend to throw back what&#039;s thrown to &#039;skeptics&#039; in general and Steve / John A in particular rather than just at me.  Likewise you, being clearly identified with the Mann camp, are likely to have blow-back from what they do in addition to your own interpersonal transgressions.]]></description>
		<content:encoded><![CDATA[<p>I think it was Cheer that used &#8220;whiter than white&#8221; in the US.</p>
<p>I try to use the &#8220;tit for 2 tats&#8221; style of reaction to ad homs, but since few people are willing to only insult me once, after a bit people have difficulty telling who started it.  Of course this site has a bit different focus than a more general site so  I tend to throw back what&#8217;s thrown to &#8216;skeptics&#8217; in general and Steve / John A in particular rather than just at me.  Likewise you, being clearly identified with the Mann camp, are likely to have blow-back from what they do in addition to your own interpersonal transgressions.</p>
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		<title>By: Peter Hearnden</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34781</link>
		<dc:creator><![CDATA[Peter Hearnden]]></dc:creator>
		<pubDate>Sun, 24 Jul 2005 08:35:13 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34781</guid>
		<description><![CDATA[Re 60. No Dave, Persil is a washing powder :)(which I thought wasn&#039;t just UK...) which get&#039;s it&#039;s whites &#039;whiter than white&#039;.

That said, I can, embarrasingly, now see how my comment might be taken in a different way. That was not my intention, and to any who might seen it as such I sincerely apologise.]]></description>
		<content:encoded><![CDATA[<p>Re 60. No Dave, Persil is a washing powder <img src='http://s0.wp.com/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> (which I thought wasn&#8217;t just UK&#8230;) which get&#8217;s it&#8217;s whites &#8216;whiter than white&#8217;.</p>
<p>That said, I can, embarrasingly, now see how my comment might be taken in a different way. That was not my intention, and to any who might seen it as such I sincerely apologise.</p>
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		<title>By: Dave Dardinger</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34780</link>
		<dc:creator><![CDATA[Dave Dardinger]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 16:51:02 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34780</guid>
		<description><![CDATA[Peter,

Who or what is a Persil white?

No, my birth name, David Earl Dardinger is what I use online and have always used either as David Dardinger, Dave Dardinger or DED for short.  You could google for my name if you want further information.]]></description>
		<content:encoded><![CDATA[<p>Peter,</p>
<p>Who or what is a Persil white?</p>
<p>No, my birth name, David Earl Dardinger is what I use online and have always used either as David Dardinger, Dave Dardinger or DED for short.  You could google for my name if you want further information.</p>
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		<title>By: Peter Hearnden</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34779</link>
		<dc:creator><![CDATA[Peter Hearnden]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 16:15:34 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34779</guid>
		<description><![CDATA[Re 56, well, yes, I suppose it could be seen that way. Hey, I&#039;ll set a trend, I&#039;ll be the first person here ever to admit to an ad hom! Btw, Dave, are you Persil white?

Funny how accusing people of lying/fraud/corruption and insulting the intelligence of IPCC scientists doesn&#039;t seem to be to ad hom here though...odd that eh?]]></description>
		<content:encoded><![CDATA[<p>Re 56, well, yes, I suppose it could be seen that way. Hey, I&#8217;ll set a trend, I&#8217;ll be the first person here ever to admit to an ad hom! Btw, Dave, are you Persil white?</p>
<p>Funny how accusing people of lying/fraud/corruption and insulting the intelligence of IPCC scientists doesn&#8217;t seem to be to ad hom here though&#8230;odd that eh?</p>
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		<title>By: Michael Jankowski</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34778</link>
		<dc:creator><![CDATA[Michael Jankowski]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 13:57:18 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34778</guid>
		<description><![CDATA[&lt;blockquote&gt;Greg, so many contradictory answers. Some sceptics, like Hans (hi Hans), say it can be done, some, you, it can&#039;t. Oh well.&lt;/blockquote&gt;

You make it sound like it&#039;s a negative to not chant the same things in lockstep.]]></description>
		<content:encoded><![CDATA[<blockquote><p>Greg, so many contradictory answers. Some sceptics, like Hans (hi Hans), say it can be done, some, you, it can&#8217;t. Oh well.</p></blockquote>
<p>You make it sound like it&#8217;s a negative to not chant the same things in lockstep.</p>
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		<title>By: Dave Dardinger</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34777</link>
		<dc:creator><![CDATA[Dave Dardinger]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 13:38:23 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34777</guid>
		<description><![CDATA[No Greg, Peter&#039;s trying to plant the idea that you&#039;re a young-earth Creationist and therefore not worth listening to.  Typical of his ad-hom attacks.]]></description>
		<content:encoded><![CDATA[<p>No Greg, Peter&#8217;s trying to plant the idea that you&#8217;re a young-earth Creationist and therefore not worth listening to.  Typical of his ad-hom attacks.</p>
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		<title>By: Greg F</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34776</link>
		<dc:creator><![CDATA[Greg F]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 11:23:50 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34776</guid>
		<description><![CDATA[RE # 52 &quot;&lt;i&gt;Greg, so many contradictory answers. Some sceptics, like Hans (hi Hans), say it can be done, some, you, it can&#039;t.&lt;/i&gt;&quot;

Ummm ... no. Hans conditions for being able to do a reconstruction are hypothetical. Hans states &quot;It starts with proper data sampling&quot;. Data sampling requirements are defined by the sampling theorem. Tree rings fail to satisfy the theorem (the data points are undersampled and aliased in the time domain). While I was writing this Hans beat me to the spatial domain aliasing problem. In one case were talking about amplitude vs. time, in the other amplitude vs. distance, the math being essentially the same (spatial being a bit more complex since it involves 2 dimensions).

&quot;&lt;i&gt;I&#039;m not sure that climate reconstructions are trying to overturn the laws of physics - not a good parallel imo.&lt;/i&gt;&quot;

And what parallel are you referring to? This looks like another one of your strawman arguments.

&quot;&lt;i&gt;Otoh I do think it&#039;s more like you saying you dismiss recons of the geological past.&lt;/i&gt;&quot;

I made no comment on those reconstructions. You are changing the subject and building a strawman.

&quot;&lt;i&gt;Perhaps you think the geological record IS open to other interpretations?&lt;/i&gt;&quot;

Perhaps I have not looked at those reconstructions in enough detail to develop an informed position. Peter, please try to stay focused on the subject we are addressing.]]></description>
		<content:encoded><![CDATA[<p>RE # 52 &#8220;<i>Greg, so many contradictory answers. Some sceptics, like Hans (hi Hans), say it can be done, some, you, it can&#8217;t.</i>&#8221;</p>
<p>Ummm &#8230; no. Hans conditions for being able to do a reconstruction are hypothetical. Hans states &#8220;It starts with proper data sampling&#8221;. Data sampling requirements are defined by the sampling theorem. Tree rings fail to satisfy the theorem (the data points are undersampled and aliased in the time domain). While I was writing this Hans beat me to the spatial domain aliasing problem. In one case were talking about amplitude vs. time, in the other amplitude vs. distance, the math being essentially the same (spatial being a bit more complex since it involves 2 dimensions).</p>
<p>&#8220;<i>I&#8217;m not sure that climate reconstructions are trying to overturn the laws of physics &#8211; not a good parallel imo.</i>&#8221;</p>
<p>And what parallel are you referring to? This looks like another one of your strawman arguments.</p>
<p>&#8220;<i>Otoh I do think it&#8217;s more like you saying you dismiss recons of the geological past.</i>&#8221;</p>
<p>I made no comment on those reconstructions. You are changing the subject and building a strawman.</p>
<p>&#8220;<i>Perhaps you think the geological record IS open to other interpretations?</i>&#8221;</p>
<p>Perhaps I have not looked at those reconstructions in enough detail to develop an informed position. Peter, please try to stay focused on the subject we are addressing.</p>
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		<title>By: fFreddy</title>
		<link>http://climateaudit.org/2005/07/20/mbh98-source-code-cross-validation-r2/#comment-34775</link>
		<dc:creator><![CDATA[fFreddy]]></dc:creator>
		<pubDate>Sat, 23 Jul 2005 11:16:39 +0000</pubDate>
		<guid isPermaLink="false">http://www.climateaudit.org/?p=268#comment-34775</guid>
		<description><![CDATA[Attn Peter Hearnden

Peter, when you have a moment, could you check back in on our conversation in &quot;Conflict of Interest #2&quot;]]></description>
		<content:encoded><![CDATA[<p>Attn Peter Hearnden</p>
<p>Peter, when you have a moment, could you check back in on our conversation in &#8220;Conflict of Interest #2&#8243;</p>
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