Re:bar charts with error bars?

*To*: mathgroup at smc.vnet.net*Subject*: [mg4621] Re:bar charts with error bars?*From*: dsmith at psy.ucsd.edu (David Smith)*Date*: Wed, 21 Aug 1996 03:25:37 -0400*Organization*: Univ. of California, San Diego*Sender*: owner-wri-mathgroup at wolfram.com

In article <4shut5$g7n at ralph.vnet.net>, mharm at gizmo.usc.edu (Mike Harm) wrote: > I'm using the Graphics package to do some bar charts. > I've figured out how to do it, but how does one add > error bars to the bars, to indicate statistical standard > error? Any insights? > >The idea provided by David of combining BarChart with >ErrorListPlot works fine for a single row of bars (thanks David!) >Anyone have any suggestions on what to do >for grouped bar charts, such as what you get with > >BarChart[{1,2,2,3},{2,3,3.5,4}, > BarLabels->{"Monday","Tuesday","Wednesday","Thursday"}] > >It's not clear how to use ErrorListPlot here, since there >are multiple bars for each x value. Hi, You should be able to use BarChart and ErrorListPlot in the same way as before except you would need to use non-integer values along the x-axis. Something like ... ErrorListPlot[{{1,1,0.3},{1.4,2,0.5},...}}] where the 0.4 offset of the second x-value from the first x-value should place the error bar in the right place. Just do the same for the second set, i.e. {2,?,?},{2.4,?,?} and so on. David Smith dsmith at psy.ucsd.edu Dept of Psychology Univ. California, San Diego ==== [MESSAGE SEPARATOR] ====