Once I have located the peaks of a spectrum, how do I determine the uncertainty of their postion?

If I use this code to determine the peaks and their positions, how do I determine the uncertainty of the position? I am told the software Peak Fit will do this but I do not want to have to buy it since I know it can be done in Matlab.

load sunspot.dat
year = sunspot(:,1);
relNums = sunspot(:,2);
findpeaks(relNums,year)
xlabel('Year')
ylabel('Sunspot Number')
title('Find All Peaks')

Answer 1

[Kwin]

I think you can only determine uncertainty of something if you have multiple measurements of it (the more the better). If you only have a sample size of one, you can't say anything. If you have more you could use std(), which calculated the standard deviation of your multiple measurements.