Error bars are all the same size?
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Anna
am 1 Apr. 2014
Bearbeitet: Azzi Abdelmalek
am 1 Apr. 2014
Here is my code:
x = [8,9,10,12,14,16,18,20,25,30,40,50];
y = [10.7,8.9,7.3,5.5,4.3,3.4,2.7,2.3,1.6,1.1,0.7,0.5];
x = 1./(x.^2);
[c,s] = polyfit(x,y,1);
[f,delta] = polyval(c,x,s);
plot(x,y)
errorbar(x,f,delta)
Why does the plot result in the error bars all being the same size because experimentally they shouldn't be. What am I doing wrong?
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Azzi Abdelmalek
am 1 Apr. 2014
Bearbeitet: Azzi Abdelmalek
am 1 Apr. 2014
If you look at delta, you can see that the values are not equal
0.2935 0.2719 0.2608 0.2526 0.2515 0.2522 0.2535 0.2547 0.2571 0.2587 0.2605 0.2614
The values are slightly different, visually, you can't see the difference in the figure
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