Error Bars On A Log Scale
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Content Flagged as Spam Help MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange chart error bars excel 2010 ThingSpeak Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help Trial software Adam Goldsmith (view profile) 3 questions 0 answers 0 accepted answers
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Reputation: 1 Vote1 How do I get working y-axis errorbars using a log scale? Asked by Adam Goldsmith Adam Goldsmith (view profile) 3 questions 0 answers 0 accepted answers Reputation: 1 on 8 Sep 2015 Latest activity Answered by Mike Garrity Mike Garrity (view profile) 0 questions 370 answers 198 accepted answers Reputation: 1,170 on 8 Sep 2015 how to insert error bars in excel mac 81 views (last 30 days) 81 views (last 30 days) I'm trying to plot data on a semilog plot (y-axis: log, x-axis: linear), but the errorbars are seriously screwed up.All I'm doing is loading my data and entering:figure errorbar(hp_v3,hp_D0,hp_D0_,'ok') set(gca,'YScale','log') where hp_D0_ is the vector of uncertainty values for vector hp_D0. This results in the plot attached as an image, which obviously isn't working.I've also tried errrobarlogy, which produces literally the same plot. Any ideas? 0 Comments Show all comments Tags semilogyploterrorbarerrorbarlogyfigures Products MATLAB Related Content 1 Answer Mike Garrity (view profile) 0 questions 370 answers 198 accepted answers Reputation: 1,170 Vote1 Link Direct link to this answer: https://www.mathworks.com/matlabcentral/answers/241261#answer_191705 Answer by Mike Garrity Mike Garrity (view profile) 0 questions 370 answers 198 accepted answers Reputation: 1,170 on 8 Sep 2015 That looks like what happens if the bottom of the errorbar is negative.What do you get if you do this:h = errorbar(hp_v3,hp_D0,hp_D0_,'ok'); h.YData - h.LData Are the resulting values negative?If so, what's happening is that the log transform of the negat
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MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Post A y error bars New Message Advanced Search Help Trial software error bars in log-log scale Subject: error bars in log-log scale From: Marco Date: 12 Sep, 2002 08:55:41 Message: 1 of https://www.mathworks.com/matlabcentral/answers/241261-how-do-i-get-working-y-axis-errorbars-using-a-log-scale 6 Reply to this message Add author to My Watch List View original format Flag as spam Anybody knows how can I plot error bars in a semi- or bi-logarythmic scale? The command errorbar does not help... thanx Marco Subject: error bars in log-log scale From: nospam@thank.you (De... Date: 12 Sep, 2002 13:20:21 Message: 2 of 6 https://www.mathworks.com/matlabcentral/newsreader/view_thread/39537 Reply to this message Add author to My Watch List View original format Flag as spam On Thu, 12 Sep 2002 08:55:41 -0400, Marco
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Graphpad.com FAQs Find ANY word Find ALL words Find EXACT phrase Plotting the geometric mean with geometric SD error bars FAQ# 1910 Last Modified 26-September-2014 The figure below shows a plot of data sampled from a lognormal distribution. Notice that the distribution is not symmetrical. The graph on the left plots the individual data points and superimposes a horizontal line at the arithmetic mean, and error bars showing plus and minus one SD. This is a simple choice in Prism's Format Graph dialog. Showing the mean with SD error bars really does not do a great job of showing the variation in the data. If you only saw the mean and error bars (which many scientists like to plot) without the raw data, you would be mislead. If the data were more skewed, the SD might be large enough that the downward pointing error bar might go below the axis to a negative Y value. The graph in the middle plots the geometric mean along with the 95% confidence interval of that geometric mean. These error bars give you a good sense of how precisely you know the populationgeometric mean, but don't show the amount of scatter. The graph on the right uses a logarithmic axis. This is created in Prism by a setting in the upper right of the Format Axis dialog. The error bars show the arithmetic mean and the error bars show plus or minus one SD. The error bars are symmetrical in terms of the values they represent, but on a log scale the lower error bar is much longer. This still doesn't do a great job of showing variation. If the downward error bar would go to a negative value, Prism (starting with 6.05 and 6.0f) doesn't even show it at all (because negative values cannot be shown on logarithmic axes). What about plotting the geometric mean with the geometric SD? Prism doesn't do this automatically, but you can make it do so with a bit of wo