Obtain the mean angle (circle mean of a file)
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Hi, first of all, thank you for reading me, i need something very simple but i can't find a good program to do this...
The average of wind direction data.
i am using matlab 2019a, and have all this data (for a year) and i need the average of this data (attach photo) for every row (this data are in degree, so this not regular mean is circle mean that i need) , so every 10 minutes, so in the end i want to have only one column, i am using meanangle, but i don't obtain good results.
don't obtain good results.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/341575/image.jpeg)
if you can help me I would appreciate it too much
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Bruno Luong
2020-8-5
编辑:Bruno Luong
2020-8-5
angledata_deg is your angle data in degree
meanangle_deg = rad2deg(atan2(mean(sind(angledata_deg),2),mean(cosd(angledata_deg),2)))
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Bruno Luong
2020-8-5
编辑:Bruno Luong
2020-8-5
Normal, since atan2 returns angle in [-pi,pi] so it can be negative, if you prefer angle in [0,2*pi]
do this after the first command.
meanangle_deg = mod(meanangle_deg ,360)
更多回答(2 个)
Jessica Langsdale
2020-8-5
%enter the number of rows here
arraySize=5;
meanData=zeros(arraySize,1)
for i=1:5
meanData(i)=mean(originalData(i,:))
end
Replace all the variables with your stuff. I think this is what you need? I'm not quite sure what you mean by 'circle mean' but this fits the description of the second half of your question.
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