# Plot Measuring Results with ERRORBAR

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Mepe on 10 Dec 2020
Answered: Ive J on 10 Dec 2020
Hello,
I would like to display the mean values from various measurements and of course the deviations using "errorbar".
Assuming the following series of measurements are given:
Test_01=[1 2 3 4 5 6]
Test_02=[1.5 2.5 3.5 4.5 5.5 6.5]
Test_03=[0.5 1.5 2.5 3.5 4.5 5.5]
x=[1 2 3 4 5 6]
Can a plot with errorbar be generated directly from this or does the mean value and deviations have to be calculated manually?

Star Strider on 10 Dec 2020
I would do something like this:
Test_01=[1 2 3 4 5 6];
Test_02=[1.5 2.5 3.5 4.5 5.5 6.5];
Test_03=[0.5 1.5 2.5 3.5 4.5 5.5];
x=[1 2 3 4 5 6];
Test_All = cat(1, Test_01, Test_02, Test_03);
TestMean = mean(Test_All);
TestStdv = std(Test_All);
figure
errorbar(x, TestMean, TestStdv)
grid
xlim(xlim+[-1 1])
The xlim call simply moves the first and last points away from the axis edges, and is optional.

Ive J on 10 Dec 2020
You should calculate meaningful error estimates yourself (SD, SEM, etc), and plot it with errorbar.
doc errorbar