How to barplot with standard deviation?

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Pinga 2014-7-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141085-how-to-barplot-with-standard-deviation

评论： Star Strider 2014-7-21

采纳的回答： Star Strider

在 MATLAB Online 中打开

I've got following code so far:

if true
  % code
end
load('Mean.mat') % Mean contains all mean values and consists of 5 rows
x = [time]; % define x-axis
y = [IC1,IC2,IC3,IC4]; % define y-axis
figure;
hBars = bar(y,1.0); % create bar plot with y;
set(gca,'XTickLabel',{'Baseline','0,1','0.2','0.3','0.4','0.5'});
  % set ticks and tick labels
xlabel('Time');
ylabel('Impulse');
hold on;
load('standarddev.mat') % standarddev contains all calculated standard deviation and consists of 5 %rows
std = [sd1,sd2,sd3,sd4,sd5]; % define y-axis
errorbar(x,y,std);
title('Impulse');
legend('a','b','c','d','Location','SouthEastOutside')
  % put in lower right

The plot itself works fine. I'd like to include the errorbars for the standard deviation as well but that unfortunately doesn't work at the moment. I've already had a look at the MATLAB Documentation Center bt without success.

Any help would be appreciated.

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Star Strider 2014-7-9

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We did this a few weeks ago in How to add errorbars. Be sure to read dpb’s answer as well.

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更多回答（2 个）

Pinga 2014-7-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141085-how-to-barplot-with-standard-deviation#answer_144504

在 MATLAB Online 中打开

Errorbar.pdf

Thank you, I should have done that. In the meanwhile I did but it somehow still doesn't work. Only about the half of all errorbars are plotted and still not placed in the center top of the bars (see attachment).

Since I'm new to MATLAB, I would thankful for every suggestion on my code.

if true
  % code
end
load('Mean.mat') % Mean contains all mean values and consists of 5 rows
load('Stddeviation.mat')
x = [time]; % define x-axis
y = [IC1,IC2,IC3,IC4]; % define y-axis
e = [std1,std2,std3,std4,std5,std6]; % define standard deviation
figure;
hBars = bar(y,1.0,'gropued');
set(gca,'XTickLabel',{'Baseline','0,1','0.2','0.3','0.4','0.5'});
% set ticks and tick labels
xlabel('Time');
ylabel('Impulse');
hold all;
for i = 1:6;
    j = 1:4;
    x = -0.5 + i + 1/5 *j;
    errorbar(x,y,(j,i),e(j,i),'.'); % plotting errors
end
title('Impulse');
legend('a','b','c','d','Location','SouthEastOutside')
% put in lower right
box off;
hold off;

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Star Strider 2014-7-18

I received a reply from TMW with respect to your problem. The essence of the reply follows. (Note: ‘Feel free to let him know that he can contact us directly if he is still having issues. We would be happy to help him directly and, in that case, taking a closer look at what is happening with screen sharing would be the best option.’)

--------------------------------------------------

I read the conversation on MATLAB Answers and ran the code that you posted. It also works fine on my computer.

The error message is clear: one of the handles in the "hBars" vector, or one of the children of one of these objects, refers to an object that does not exist anymore. This would typically happen if the figure was closed.

Unfortunately, I cannot help him anymore than you already did without having access to his computer. The first suggestion would be to step through the code and look at the handles in "hBars" and their children after calling "bar" and after each "get" call, making sure that they exist.

I would also suggest to check that the "bar" function is not shadowed by something else with

>> which -all bar

It could be possible that there is a function named "bar" on the path that returns a double (assuming he is using MATLAB R2014a or older) without throwing an error for these input arguments. In that case, the output would not a valid handle.

That fact that the error bars in the PDF he attached are off is very strange. That could indicate that there is something wrong with his data (e.g., he changed the value of "y" midway through the script) or with his files. It could be possible that he did not run the script at once (F5) but he executed lines here and there without clearing the workspace and closing all the figures.

I would also take a look at the renderer used to display the figure and ask if he changed any of the defaults properties of the graphics root object 0.

Feel free to let him know that he can contact us directly if he is still having issues. We would be happy to help him directly and, in that case, taking a closer look at what is happening with screen sharing would be the best option.

Again, I apologize that I could not be more helpful. I am now closing this case as unresolved. Please let me know if you have additional questions

--------------------------------------------------

Pinga 2014-7-21

Great, thank you for everything!

Star Strider 2014-7-21

My pleasure!

I’m sure with TMW’s help, you’ll get it sorted!

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Pinga 2014-7-10

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/141085-how-to-barplot-with-standard-deviation#answer_144542

What I've tried is to switch the columns/rows since the last plot only showed four groups of errorbars. But that didn't solve the problem. I left the values for the standard deviation in this switched order.

That would be great, if anyone could help me - I've been trying for some days now to only plot these data.