Histogram Error Bars
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Articles Mathematics *Lucid* Journal Categories Info Contact Welcome to the site! Histogram Errors Neat example of how to think the right way in maths Return to top Please note this site uses cookies, histogram errors and your consent is assumed if you continue to browse it. We don't how to calculate error bars do anything suspicious with them, really.Table of ContentsThe Silly Way - Random SumsDerivation of the random sum resultsSummary of
Error Bars In Excel
random sum formulaeApplication to the histogram problemThe Sensible WayDerivation of the answerEqual weights caseRare events - Poisson distributionTry it out Histogram Errors Written: 10/04/2012 Last edited: 22/06/2012 Filed under: Specialist Topics, Applied
Histogram Error Bars Matlab
Maths Target audience: You will want to know some basic probability. Warning: NOT YET PROOFREAD Here's a moderately common problem: you make a bunch of observations of data, falling into some buckets or bins in a histogram, and maybe they have different weights too (because you know some observations will be more or less common than others in the real world, but they're not error bar matlab in your sampling, typically). You draw a histogram. Where do the error bars go? Suppose you are taking N observations in total, and pick some particular bin, k. Let Sk be the sum of all weights of the observations/events lying in this bin, Now here we have two sets of random variables - Nk is the number of observations lying in this bin, whilst Wj is the weight of each sample in the bin. We want to work out the variance of Sk. Aside: As discussed in the paper mentioned below, it's actually debatable whether you should use this variance to obtain error bars. We'll focus here on the explicit problem of obtaining the variance of the above sum in terms of the exact distributions of the incoming data, and just assume we can approximate it in the usual ways given some data, and use this for error bars. Here are two ways of looking at the problem: Skip to the good way... The Silly Way - Random Sums The complicated way to do this involves using the so-called random sum formulae. It's surprisingly difficult to find things using this
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Error Histogram In Neural Network
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running ROOT here. Please post bug reports in Jira. Moderator: rootdev Post Reply Search Advanced search First unread post https://root.cern.ch/phpBB3/viewtopic.php?t=8867 • 2 posts • Page 1 of 1 kshaw Posts: 35 Joined: Mon Oct 29, 2007 14:36 histogram error bars Quote Unread postby kshaw » Tue Jul http://stackoverflow.com/questions/12023736/gnuplot-barchart-histogram-with-errorbars 21, 2009 12:53 Hi I want to draw my histogram as a set of points with error bars. I have found the option hist->Draw("e1p") which does just error bar this and I assume sets the error bars to sqrt{N}, N being number of points. However I want to add the systematic error of each datapoint onto the error, so the error bar actually shows sigma / sqrt{N} (where sigma = error on each datapoint, and is the same for each datapoint). Do you histogram error bars know how I can do this? Thanks Top couet Posts: 7290 Joined: Tue Sep 02, 2003 9:32 Location: CERN Contact: Contact couet Website Quote Unread postby couet » Wed Jul 22, 2009 9:48 One way is to use http://root.cern.ch/root/html/TGraphAsymmErrors.html Top Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending Post Reply 2 posts • Page 1 of 1 Return to “ROOT Support” Jump to General Announcements ROOT ROOT Support Stat and Math Tool Support PyROOT Support PROOF Support ROOT Documentation My ROOT App Development Ideas CINT CINT Support Cling Cling Support Non-ROOT Specific General Chat Test Me Who is online Users browsing this forum: No registered users and 4 guests Board index All times are UTC+02:00 Delete all board cookies The team Contact us Powered by phpBB Forum Software © phpBB LimitedSE Square Left by PhpBB3 BBCodes
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Gnuplot barchart histogram with errorbars up vote 7 down vote favorite 2 I want to the results of my benchmarks. I compare two virtual machines with each other and have data of the following form: BENCHMARK VM1_TIME VM1_ERROR VM2_TIME VM2_ERROR I want to generate a barchart diagram from this data which should look like this: Could somebody provide the code how to do this? I know this kind of request is unbeloved, but I really need this and googled for something like 2 hours, without a satisfactoring result. Thanks in advance, Sven gnuplot bar-chart share|improve this question asked Aug 19 '12 at 2:25 Sven Hager 1,14721022 1 What about sharing your data, or offering some mock data, to play with? –vaettchen Aug 19 '12 at 2:55 I do not have concrete data yet because I need to know in what format Gnuplot wants it. However, it is clear that I have 5 columns of data: 1) Benchmark name 2) Time it took VM 1 to compute it (in milliseconds) 3) Time it took VM 2 to compute it (in milliseconds) 4) Error of VM 1 times (in milliseconds) 5) Error of VM 2 times (in milliseconds) –Sven Hager Aug 19 '12 at 13:02 If you want help, you need to provide data in a way that can easily copied & pasted - dput( mydata ) is always good. It will also be a good idea to provide the code you have tried that got you close but did not work. This is not only a matter of courtesy but also helps to avoid misunderstandings in terms of data structure, objectives etc. –vaettchen Aug 19 '12 at 13:46 1 possib