Error bars not working on loglog plot
16 次查看(过去 30 天)
显示 更早的评论

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
Adam Danz
2022-3-23
See Star Strider's answer.
You may also want to review some log properties
采纳的回答
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.)
5 个评论
Adam Danz
2022-3-23
> Is there any way for me to get the error bars to look normal on the loglog axis?
see this related answer
更多回答(0 个)
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Annotations 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!