Error bars on categorical bar plot

Question

NA 2020-5-30

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/538411-error-bars-on-categorical-bar-plot

评论： the cyclist 2020-5-30

Hi,

I'm trying to plot error bars on my categorical plot, but the second error bar doesn't align with the second bar. Can someone please help me with this.

The version of MATLAB I'm using is R2019b.

My code is as follows:

%Define the colors' RGB values in a matrix
col(1,:) = [1 0 0]; % -- red
col(2,:) = [0, 0.4470, 0.7410]; % -- blue
x = categorical({'Control', 'Folic Acid'}); %xaxis
x = reordercats(x,{'Control', 'Folic Acid'}); %specified order
y = [1.8493, 1.8]; %yaxis
SEM=[0.0168, 0.0170];
figure; bar(x(1), y(1), 0.5, 'FaceColor',col(1,:)); hold on;
errorbar(y(1),SEM(1),'k','linestyle','none'); hold on;
bar(x(2), y(2), 0.5, 'FaceColor',col(2,:)); hold on;
errorbar(y(2),SEM(2),'b','linestyle','none'); hold off;
title('Brain Weight')
ylabel('Weight (g)')

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Answer 1

the cyclist 2020-5-30

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/538411-error-bars-on-categorical-bar-plot#answer_443091

编辑：the cyclist 2020-5-30

在 MATLAB Online 中打开

Call errorbar with this syntax instead:

errorbar(x(1),y(1),SEM(1),'k','linestyle','none');
errorbar(x(2),y(2),SEM(2),'b','linestyle','none');

FYI, your code can be simplified to the following:

%Define the colors' RGB values in a matrix
col(1,:) = [1 0 0]; % -- red
col(2,:) = [0, 0.4470, 0.7410]; % -- blue
x = categorical({'Control', 'Folic Acid'}); %xaxis
x = reordercats(x,{'Control', 'Folic Acid'}); %specified order
y = [1.8493, 1.8]; %yaxis
SEM=[0.0168, 0.0170];
figure
hold on
b = bar(x, y, 0.5, 'FaceColor',col(2,:));
b.FaceColor = 'flat';
b.CData= col;
errorbar(x,y,SEM,'k','linestyle','none');
title('Brain Weight')
ylabel('Weight (g)')
hold off