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Lily
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Bar with errorbars on the same figure

Asked by Lily
on 29 Aug 2013
Latest activity Edited by Guillem Heinrich on 20 Jul 2017
Hi
I'm trying to plot bar with errorbars on the same figure. I tryed to use barweb (<http://www.mathworks.com/matlabcentral/fileexchange/10803-barweb-bargraph-with-error-bars>) but it doesn't seem to work. Is there an inbuilt function in Matlab?
The data I'm working with is similar to this:
mean_velocity = [0.2574, 0.1225, 0.1787]; % mean velocity
std_velocity = [0.3314, 0.2278, 0.2836]; % standard deviation of velocity

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2 Answers

Answer by the cyclist
on 29 Aug 2013

There is not a built-in for this, but you can superpose an errorbar() chart with a bar chart:
mean_velocity = [0.2574, 0.1225, 0.1787]; % mean velocity
std_velocity = [0.3314, 0.2278, 0.2836]; % standard deviation of velocity
figure
hold on
bar(1:3,mean_velocity)
errorbar(1:3,mean_velocity,std_velocity,'.')
I feel that this may not be exactly what you want, but it should give you an idea of what is possible

  10 Comments

@Allison
"pause" is required but not because it gives matlab some time to draw, but because, internally, "pause" calls "drawnow". just drawnow should work too
figure
hold on
bar(1:9,mean_velocity1)
errorbar(1:9,mean_velocity1,std_velocity1,'.')
figure
hold on
group = [mean_velocity1 mean_velocity2];
bar(1:9,mean_velocity2)
errorbar(1:9,mean_velocity2,std_velocity2,'.')
figure
hold on
gives me separate graphs. How shall I compare them in 1 plot with different colors?
@chaitra You are creating a new figure for the second plot --> comment the fifth line of your code.

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Answer by Leidy Castro Meneses on 10 Mar 2017
Edited by Leidy Castro Meneses on 10 Mar 2017

Hi Based on the previous answer, I figured this script out:
young= [458.05,509.63]; %values are for young and old respectively
young2= [458.05,509.63,200,340];
old= [200,340];
group = [young;old];
SEM=[12,12,56,45]; % values for error bars
figure
hold on
bar(1:2,group)
errorbar([0.86,1.14,1.86,2.14],young2,SEM,'.') %errorbar(x,y,err)

  1 Comment

How to change colors ?([0.86,1.14,1.86,2.14], what is the use of this?

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