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	<title>Geneva Physics Program &#187; ROOT chat</title>
	<atom:link href="http://physics.bu.edu/sites/geneva-program/category/root/feed/" rel="self" type="application/rss+xml" />
	<link>http://physics.bu.edu/sites/geneva-program</link>
	<description>Just another Boston University Physics weblog</description>
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		<title>something wrong&#8230;?</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/21/something-wrong/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/21/something-wrong/#comments</comments>
		<pubDate>Sun, 21 Feb 2010 21:33:35 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=464</guid>
		<description><![CDATA[Hi everyone,, So, I am trying to do the trigger part. And the way I did is to select the useful elements in the leaves needed (e.g. from the leaf mu_py, I want a list of elements that satisfies the trigger threshold (?)) And the num_entries drop from 30839 to 2988&#8230; Attached is the 3 [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Draw() with trg_L1MuOpen</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/21/draw-with-trg_l1muopen/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/21/draw-with-trg_l1muopen/#comments</comments>
		<pubDate>Sun, 21 Feb 2010 16:39:05 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=462</guid>
		<description><![CDATA[Hi, sorry for posting too many questions&#8230; I forget the Draw command includes the &#8220;trg_L1MuOpen&#8221; and it has already been erased in my history&#8230; If anyone know, please let me know&#8230; Thanks. Elim =D]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/21/draw-with-trg_l1muopen/feed/</wfw:commentRss>
		<slash:comments>2</slash:comments>
		</item>
		<item>
		<title>ROOT error message&#8230;</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/21/root-error-message/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/21/root-error-message/#comments</comments>
		<pubDate>Sun, 21 Feb 2010 12:56:00 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=458</guid>
		<description><![CDATA[I keep on getting this error message: *** Break *** segmentation violation gdb not found, need it for stack trace Does anyone know what it means?? Thanks, Elim =D]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/21/root-error-message/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>About the variables in muons.root</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/21/about-the-variables-in-muons-root/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/21/about-the-variables-in-muons-root/#comments</comments>
		<pubDate>Sun, 21 Feb 2010 09:24:59 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=456</guid>
		<description><![CDATA[Hi Edgar, I am confused by the structure of the tree. Is it that each instance has an array of pt or that each instance has 1 value for mu_pt? If it is an array, why would it be? Is it because pt is changing with time? But then, what does its histogram represent? is [...]]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/21/about-the-variables-in-muons-root/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>About AnalyzeRootuple.C</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/20/about-analyzerootuple-c/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/20/about-analyzerootuple-c/#comments</comments>
		<pubDate>Sat, 20 Feb 2010 17:27:31 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=450</guid>
		<description><![CDATA[Hi Edgar, I am studying the program AnalyzeRootuple.C, and I remember that we were playing with the code during class. One thing that you did is to plot a histogram for mu_charge, and you declared the float variable mu_charge by the statement: float mu_charge[200]. But I don&#8217;t understand why it&#8217;s 200&#8230; And what happens when [...]]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/20/about-analyzerootuple-c/feed/</wfw:commentRss>
		<slash:comments>1</slash:comments>
		</item>
		<item>
		<title>Somewhat helpful tutorial&#8230;.</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/04/somewhat-helpful-tutorial/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/04/somewhat-helpful-tutorial/#comments</comments>
		<pubDate>Thu, 04 Feb 2010 19:38:25 +0000</pubDate>
		<dc:creator>Andrea</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=358</guid>
		<description><![CDATA[Hey all! When I started using ROOT over the summer, there was this Tutorial I found&#8230; online (not the CERN one, it&#8217;s actually by Professor Bose) which I thought was very helpful for basic histogram stuff. I know some of you have been asking how to use ROOT besides just opening files and this may be [...]]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Opening another display window in ROOT?</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/04/opening-another-display-window-in-root/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/04/opening-another-display-window-in-root/#comments</comments>
		<pubDate>Thu, 04 Feb 2010 17:25:53 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=354</guid>
		<description><![CDATA[Does anyone know the statement to open new windows in ROOT when I plot another plots? Thanks, Elim =)]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/04/opening-another-display-window-in-root/feed/</wfw:commentRss>
		<slash:comments>3</slash:comments>
		</item>
		<item>
		<title>Homework</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/04/homework/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/04/homework/#comments</comments>
		<pubDate>Thu, 04 Feb 2010 12:16:47 +0000</pubDate>
		<dc:creator>ashley</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=346</guid>
		<description><![CDATA[for the homework, we are given: TH1F *h1 = new TH1F("h1", "h1", 200, -5,5); TF1 *f1 = new TF1("f1", "[2]*TMath::Gaus(x,[0],[1])"); f1-&#62;SetParameters(1,1,1); h1-&#62;FillRandom("f1"); h1-&#62;Draw() Try typing into google "TMath root" to find an expression for a poisson fit, rather than Gaus().. Hope This Helps!!=D -Ashley]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/04/homework/feed/</wfw:commentRss>
		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Solution for problem in ROOT in Windows</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/04/solution-for-problem-in-root-in-windows/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/04/solution-for-problem-in-root-in-windows/#comments</comments>
		<pubDate>Thu, 04 Feb 2010 08:27:03 +0000</pubDate>
		<dc:creator>Elim</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/?p=332</guid>
		<description><![CDATA[For Windows users, if there are any problems dealing with ROOT, I recommand you to go back to root.cern.ch, and download it again. When you are done downloading, click &#8220;repair&#8221;. Then, it will fix the problem. (hopefully) Hope that helps, =D]]></description>
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		<slash:comments>0</slash:comments>
		</item>
		<item>
		<title>Cannot Copy/Paste anything into Root Terminal</title>
		<link>http://physics.bu.edu/sites/geneva-program/2010/02/03/cannot-copypaste-anything-into-root-terminal/</link>
		<comments>http://physics.bu.edu/sites/geneva-program/2010/02/03/cannot-copypaste-anything-into-root-terminal/#comments</comments>
		<pubDate>Wed, 03 Feb 2010 16:31:04 +0000</pubDate>
		<dc:creator>chelsea</dc:creator>
				<category><![CDATA[ROOT chat]]></category>

		<guid isPermaLink="false">http://physics.bu.edu/sites/geneva-program/2010/02/03/cannot-copypaste-anything-into-root-terminal/</guid>
		<description><![CDATA[Does anyone with Windows know how to fix this? It is making homework assignments incredibly difficult, having to type everything in. -Chelsea]]></description>
		<wfw:commentRss>http://physics.bu.edu/sites/geneva-program/2010/02/03/cannot-copypaste-anything-into-root-terminal/feed/</wfw:commentRss>
		<slash:comments>4</slash:comments>
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