Adding error bars to a grouped bar plot

Question

Shanaja 2019-1-6

2
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438514-adding-error-bars-to-a-grouped-bar-plot

回答： Star Strider 2023-6-20

Hi! I’m trying to plot a grouped bar graph with standard errors, and have managed this so far, which almost works but the SE are for some reasons plotted next to the bars rather than on them (see attached)? Any idea how to fix it? Thanks!

err = [3, 3; 1, 3];
 
y=[69,123; 74, 62];
figure
bar(y)
set(gca, 'XTickLabel', {'Cats' 'Dogs'});
hold on
errorbar(y, err, '.')
ylabel('Mean Error');
ylim([20 140]);
legend('response to novel cats', 'response to novel dogs');
saveas(gcf,['bar_2', '.jpg'])

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Vishal Chaudhary 2019-1-9

15
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438514-adding-error-bars-to-a-grouped-bar-plot#answer_355613

在 MATLAB Online 中打开

The ability to specify that the "errorbar" function display the error bars inside the individual bars is not available in MATLAB. It displays errorbar at the center of each group.

To work around this issue, find the center of each bar and pass this data into "errorbar" with the respective error values.

ngroups = size(y, 1);
nbars = size(y, 2);
% Calculating the width for each bar group
groupwidth = min(0.8, nbars/(nbars + 1.5));
for i = 1:nbars
    x = (1:ngroups) - groupwidth/2 + (2*i-1) * groupwidth / (2*nbars);
    errorbar(x, y(:,i), err(:,i), '.');
end
hold off

4 个评论
显示 2更早的评论隐藏 2更早的评论

David L 2019-10-29

This was super helpful. Thank you!!

CR 2020-6-18

This is great! Would it be possible to decrease the spacing between the grouped bars? Thanks again!

请先登录，再进行评论。

Answer 2

Steve Schaefer 2020-3-11

6
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438514-adding-error-bars-to-a-grouped-bar-plot#answer_419671

The code to create the below shown picture can be found in this MATLAB Answer:

https://www.mathworks.com/matlabcentral/answers/102220-how-do-i-place-errorbars-on-my-grouped-bar-graph-using-function-errorbar-in-matlab

2 个评论
显示无隐藏无

Jonathan Cottet 2021-4-19

@Steve Schaefer

The code for the graph is not really displayed in the link you posted (categorical graph in your picture). Could you please post it here ?

Thanks in advance !

z8080 2023-6-20

@Steve Schaefer, I would second @Jonathan Cottet's request to please post that code, as it is in fact not to be found under the given link. Thanks!

请先登录，再进行评论。

Answer 3

Star Strider 2023-6-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/438514-adding-error-bars-to-a-grouped-bar-plot#answer_1259269

An example using properties available in prior and recent MATLAB releases is provided in Putting error bars on bar plot?

One of these approaches should work for all releases (at least after R2014b when ‘Handle Graphics 2’ appeared, and perhaps for earlier releases as well). The same general approach will also work for putting numbers or other text objects above or within the bars.