Error Bars Graph R
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Error Bars Graph Excel
takes a minute: Sign up Scatter plot with error bars up vote 21 down vote favorite 11 How can I generate the following plot in R? Points, shown in the plot are the averages, and their ranges correspond to minimal
R Plot Error Bars Scatter Plot
and maximal values. I have data in two files (below is an example). x y 1 0.8773 1 0.8722 1 0.8816 1 0.8834 1 0.8759 1 0.8890 1 0.8727 2 0.9047 2 0.9062 2 0.8998 2 0.9044 2 0.8960 .. ... r plot share|improve this question edited Oct 23 '12 at 15:10 Roland 73.2k463102 asked Oct 23 '12 at 14:29 sherlock85 1521313 Since you clearly don't want a boxplot, I changed the title of your question in order to y error bars reflect what you really want. –Roland Oct 23 '12 at 15:11 1 also plotrix::plotCI, gplots::plotCI, library("sos"); findFn("{error bar}") –Ben Bolker Oct 23 '12 at 17:29 add a comment| 5 Answers 5 active oldest votes up vote 52 down vote accepted First of all: it is very unfortunate and surprising that R cannot draw error bars "out of the box". Here is my favourite workaround, the advantage is that you do not need any extra packages. The trick is to draw arrows (!) but with little horizontal bars instead of arrowheads (!!!). This not-so-straightforward idea comes from the R Wiki Tips and is reproduced here as a worked-out example. Let's assume you have a vector of "average values" avg and another vector of "standard deviations" sdev, they are of the same length n. Let's make the abscissa just the number of these "measurements", so x <- 1:n. Using these, here come the plotting commands: plot(x, avg, ylim=range(c(avg-sdev, avg+sdev)), pch=19, xlab="Measurements", ylab="Mean +/- SD", main="Scatter plot with std.dev error bars" ) # hack: we draw arrows but with very special "arrowheads" arrows(x, avg-sdev, x, avg+sdev, length=0.05, angle=90, code=3) The result looks like this: In the arrows(...) function length=0.05 is the size of the "arrowhead" in inches, angle=90 specifies that the "arrowhead" is perpendicular to the shaft of the arrow, and the particularly intuitive code=3 parameter specifies that we want to draw an arrowhead on both ends of the arrow. For hor
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dataset, and are easy to graph with Plotly and R! Error bars can be used to visualize standard deviations, standard errors or confidence intervals (just don't forget to specify which measure the error bar in the graph represents). Below are two examples that demonstrate how to graph a variety of error bars. The complete R script and data used to create these 2 graphs are available here! To create vertical error bars, like on the Snow line in the graph below, set error_y = list(type = "data", array = c(YOUR_VALUES)) 1 error_y = list(type = "data", array = c(YOUR_VALUES))
It is also possible to calculate and plot error bars with a percent value, like on the Rain line below. Set: error_y = list(type = "percent", value = CHOOSE_%_VALUE) 1 error_y = list(type = "percent", value = CHOOSE_%_VALUE) To create horizontal error bars use error_x. Furthermore, it's easy to graph asymmetrical error bars. Just set symmetric = FALSE and add an arrayminus array like this: error_x = list( type = "data", symmetric = FALSE, array = c(YOUR_HIGH_VALUES), arrayminus = c(YOUR_LOW_VALUES)) 12345 error_x = list(type = "data",symmetric = FALSE,array = c(YOUR_HIGH_VALUES),arrayminus = c(YOUR_LOW_VALUES)) Creating dashboards or visualizations at your company? Consider Plotly Enterprise for modern intracompany graph and data sharing. chelsea Tags: confidence interval, Error bars, Plotly, R, RStudio, standard deviation, standard error Post navigation Previous Post 3d surface plots with RStudio and PlotlyNext Post Using R, Python, & Plotly With Tableau Search for: Search Recent Posts nteract: Revolutionizing the Notebook Experience Simple REST APIs for charts and datasets Upgrading to plotly 4.0 (and above) Radial Stacked Area Chart in R using Plotly Analyzing Plotly’s Python package downloads R Upgrading to plotly 4.0 (and above) Radial Stacked Area Chart in R using Plotly Using cranlogs in R with Plotly New feature: Dropdown menus in Plotly and R PLOTCON 2016 - Speakers and topics in R Blog roll R-Bloggers