Error bars not working on loglog plot

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I am trying to add error bars to a loglog plot and matlab and nothing I try is working. I've gone about it in many different ways including plotting using plot(x,y) then changing the scale to log, using loglog(x,y), and trying errorbarlogx. I dont know why the error is only above the data point for the later points (it shouldnt be). This is my code that made the above graph.
loglog(distance,radiation)
log_distance=log(distance);
log_radiation=log(radiation);
fit=polyfit(log_distance,log_radiation,1)
m=fit(1)
b=fit(2)
z=polyval(fit,log(distance))
hold on;
errorbar(distance,exp(z),combined_error)
What am I doing wong?
  4 个评论
Tim Keegan
Tim Keegan 2022-3-23
I get warning:negative data ignored every time I run it

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Star Strider
Star Strider 2022-3-23
You are likely not doing anything wrong. The lower error bars are most likely negative, and values less than or equal to zero do not plot on a logarithmic axis scale. (Those logarithms are defined, however they are complex, and purely imaginary values do not plot in MATLAB.)
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