Plot arrow as upper limits in errorbar when I don't have lower bound
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Answered: Roberto Serafinelli on 23 Nov 2022
I am dealing with a variable that is strictly positive, and for which the calculation sometimes give values of the errors that are larger than the value itself. For example "1+-3" cannot be reported like that but must be reported as "<4".
I also cannot plot them as regular errorbars. Sometimes in plots you see these type of data points as arrows pointing downwards, and I was asking if it is possible to do that in Matlab.
For example in the following code I want an arrow at point (56,11) pointing downwards. How do I do this?
y=[1 2 3 4];
x=[15 1 34 56]
ey=[0.1 0.2 0.3 7];
More Answers (1)
Jeffrey Clark on 23 Nov 2022
@Roberto Serafinelli, using the e = errorbar call where the inputs are given to draw individual lines (see and Multiple lines with error barsl) will return a list e of the lines it creates for the data. The e can be indexed individually and modified as shown in ErrorBar Properties - for the individule error cases (e.g., negative values) you could use the Downward-pointing triangle marker arrow head and modify the error line lengths/colors as needed.
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