How can I create multiple lines with error bars and a legend?

Hello,

I got three data sets like this:

a=[8,2,3;2,5,2;5,2,4;1,7,4;4,4,5;2,3,3;3,2,6;3,4,5;3,2,4;2,1,3]

The first collum represents the base values, the second the " testing" and the third the "second testing".

I would like to present them as a line with 1x multiplied errorbar and a legend. Like this:

Unfortunately I do not manage to do with

errorbar(a,err)

Could you help me, please?

Thanks.

Answer 1

[ag]

Hi Max,

To achieve your goal, you will need to provide the "errorbar" function with the dataset along with the error for each dataset.

The below code snippet demonstrates how the same:

a = [8,2,3;2,5,2;5,2,4;1,7,4;4,4,5;2,3,3;3,2,6;3,4,5;3,2,4;2,1,3];

testingData1 = a(:, 2);
testingData2 = a(:, 3);

%Modify the error data as per the need
error1 = testingData1 - a(:, 1); 
error2 = testingData2 - a(:, 1);

figure;
errorbar(testingData1, error1);
hold on;
errorbar(testingData2, error2);

xlabel('X');
ylabel('Y');

legend({'Group 1', 'Group 2'}, 'Location', 'northeast');
grid on;

hold off;

●

For more details, please refer to the following MathWorks documentation:

• errorbar - https://www.mathworks.com/help/matlab/ref/errorbar.html
• legend - https://www.mathworks.com/help/matlab/creating_plots/add-legend-to-graph.html

Hope this helps!