Matlab Scatter Plot With Error Bars
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Support Support Newsreader MathWorks Search MathWorks.com MathWorks Newsreader Support MATLAB Newsgroup MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Post A New Message Advanced Search Help MATLAB Central Community Home herrorbar matlab MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Post A horizontal error bars matlab New Message Advanced Search Help Trial software error bars on scatter plots Subject: error bars on scatter plots From: Ryan McKeon Ryan errorbar matlab example McKeon (view profile) 3 posts Date: 26 Jun, 2008 21:29:02 Message: 1 of 2 Reply to this message Add author to My Watch List View original format Flag as spam I have x,y data that error bars matlab bar graph I would like to represent on a scatter plot with error bars for the x variable. The help manual only talks about how to apply error bars to points along a curve, can this be done for a scatter plot?? Thanks! Ryan McKeon Department of Earth Sciences Montana State University Subject: error bars on scatter plots From: Sean Sean (view profile) 1 post Date: 27 Jun, 2008 18:43:01 Message: 2 of 2
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Reply to this message Add author to My Watch List View original format Flag as spam I'm not sure I completely understand what you are asking. If you want an error bar plot without a curve drawn between the points just use the errorbar function like this: x = 1:4; y = exp(x); e = sqrt(y); errorbar(x,y,e,'.k') If you want horizontal error bars look up the 'herrorbar' funtion on the file exchange. Feed for this Thread Add to My Watch List What is a Watch List? × What is a watch list? You can think of your watch list as threads that you have bookmarked. You can add tags, authors, threads, and even search results to your watch list. This way you can easily keep track of topics that you're interested in. To view your watch list, click on the "My Newsreader" link. To add items to your watch list, click the "add to watch list" link at the bottom of any page. How do I add an item to my watch list? Search To add search criteria to your watch list, search for the desired term in the search box. Click on the "Add this search to my watch list" link on the search results page. You can also add a tag t
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Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged standard error matlab as Spam Help MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary errorbar matplotlib Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help Trial software Quizmaster (view profile) 7 questions 0 answers 0 accepted answers Reputation: 1 Vote0 https://www.mathworks.com/matlabcentral/newsreader/view_thread/171629 Plotting Error Bars (Uncertainties) for Scatter Plot Points Asked by Quizmaster Quizmaster (view profile) 7 questions 0 answers 0 accepted answers Reputation: 1 on 17 Sep 2015 Latest activity Answered by Star Strider Star Strider (view profile) 0 questions 6,544 answers 3,168 accepted answers Reputation: 17,038 on 17 Sep 2015 42 views (last 30 days) 42 views (last 30 days) https://www.mathworks.com/matlabcentral/answers/243627 Shown in my code below, I am calculating a vector of drag coefficients and a vector Reynolds number, and then a calculation of their uncertainties (i.e., Re+/-unc). How do I plot the vertical and horizontal error bars representing the vectors I have calculated below in the code (u_C_D and u_Re). C_D is the y-variable, Re is the x-variable, so u_CD error bars need to be going vertical, and the u_Re error bars need to be horizontal.Thanks!V = [5,6,7,8,9,10,11,12,13,14,15]; % Velocity Data in m/s F = [8.6,11.8,15.9,20.5,25.5,31.4,37.9,45.2,53.5,61.3,70.4]; % Drag Force in mN p = 1.16; % Density in kg/m^3 D = 25; % Diameter of Disk in mm m = 18.4e-6; % Viscosity in Ns/m^2 uV = 0.3; % Velocity uncertainty in m/s uF = 0.1; % Force uncertainty in mN up = 0.01; % Density uncertainty in kg/m^3 uD = 0.05; % Diameter uncertainty in mm um = 0.1e-6; % Viscosity uncertainty in Ns/m^2 Re = p*V*D*10^-3/m; % Calculation of Reynolds Numbers CD = 2*F*10^-3./(p*V.^2*pi/4*(D*10^-3)^2); % Calculation of Drag Coefficients % Calculation of uncertainties in C_D
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 http://stackoverflow.com/questions/28245213/how-to-plot-a-scatter-plot-with-error-bars-indicating-standard-deviation 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 6.2 million programmers, just like you, helping each other. Join them; it only takes a http://octave.sourceforge.net/octave/function/errorbar.html minute: Sign up How to plot a scatter plot with error bars indicating standard deviation up vote 1 down vote favorite I have a set of data Y v/s X (~20k data points) which when plotted are a scatter. I want error bars to plot error bars for Y for a ranges of X(eg. the X axis is of length 100, then I want the errorbars to represent the standard deviation of Y for every 10 units of X) matlab statistics regression share|improve this question asked Jan 30 '15 at 21:50 Haren Shetty 288 2 Something like that ? : stackoverflow.com/questions/7879449/…? –Hoki Jan 30 '15 at 21:58 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote accepted Here is error bars matlab a try: N = 100; % Number of points n = 10; % Number of x-bins % Define and plot points x = rand(N,1); y = x.*rand(N,1); scatter(x, y, '+'); % Define errorbar bin = linspace(min(x), max(x), n+1); ind = sum(bsxfun(@minus, x, ones(N,1)*bin)>=0,2); m = NaN(n,1); e = NaN(n,1); for i = 1:n m(i) = mean(y(ind==i)); % Mean value over the bin e(i) = std(y(ind==i)); % Standard deviation end hold on u = (bin(1:end-1)+bin(2:end))/2; errorbar(u,m,e,'k'); Hope this helps. share|improve this answer answered Jan 30 '15 at 22:17 Ratbert 4,2872831 Thanks a lot! This is exactly what i needed. Could you modify the same code for the error plots to indicate a 95% confidence interval and now the x axis is in log. So the error plots would be for every 10 powers.(i.e 2 errorbars for N=100, 3 errorbars for N=1000, etc) –Haren Shetty Feb 6 '15 at 20:19 I'm not sure to get what you mean with 95% interval ... –Ratbert Feb 6 '15 at 20:27 1 But for the log spacing, you can simply use the logspace instead of the linspace: bin = logspace(0, 3, 4); % Log-spaced binning (1, 10, 100, 1000) –Ratbert Feb 6 '15 at 20:28 This is what I meant by 95% confidence interval. I want to make the error bars represent this. mathworks.com/help/stats/… I have been trying to incorporate this function instead of standard deviation, but have been unsuccessful. (P.S. just start
» Octave core » by package » alphabetical C++ API Function File: errorbar (y, ey) Function File: errorbar (y, …, fmt) Function File: errorbar (x, y, ey) Function File: errorbar (x, y, err, fmt) Function File: errorbar (x, y, lerr, uerr, fmt) Function File: errorbar (x, y, ex, ey, fmt) Function File: errorbar (x, y, lx, ux, ly, uy, fmt) Function File: errorbar (x1, y1, …, fmt, xn, yn, …) Function File: errorbar (hax, …) Function File: h = errorbar (…) Create a 2-D plot with errorbars. Many different combinations of arguments are possible. The simplest form is errorbar (y, ey) where the first argument is taken as the set of y coordinates, the second argument ey are the errors around the y values, and the x coordinates are taken to be the indices of the elements (1:numel (y)). The general form of the function is errorbar (x, y, err1, …, fmt, …) After the x and y arguments there can be 1, 2, or 4 parameters specifying the error values depending on the nature of the error values and the plot format fmt. err (scalar) When the error is a scalar all points share the same error value. The errorbars are symmetric and are drawn from data-err to data+err. The fmt argument determines whether err is in the x-direction, y-direction (default), or both. err (vector or matrix) Each data point has a particular error value. The errorbars are symmetric and are drawn from data(n)-err(n) to data(n)+err(n). lerr, uerr (scalar) The errors have a single low-side value and a single upper-side value. The errorbars are not symmetric and are drawn from data-lerr to data+uerr. lerr, uerr (vector or matrix) Each data point has a low-side error and an upper-side error. The errorbars are not symmetric and are drawn from data(n)-lerr(n) to data(n)+uerr(n). Any number of data sets (x1,y1, x2,y2, …) may appear as long as they are separated by a format string fmt. If y is a matrix, x and the error parameters must also be matrices having the same dimensions. The columns of y are plotted versus the corresponding columns of x and errorbars are taken from the correspo