How can i calculate mean wind direction(in degrees) from 1 minute to 10 minutes?

14 次查看（过去 30 天）
Ana Soph
Ana Soph 2020-5-6
评论： Ana Soph 2020-5-8
Hi everybody, i have a problem, i have a 1 min data of the wind direction(in degrees) of 3 months, but i want the average every 10 minutes of this data.
I have the matlab 2015, so .. i can't use circ.mean.
Can you help me with that, please?
Thank you in advance
Best!!!
  2 个评论
Walter Roberson
Walter Roberson 2020-5-6
编辑：Walter Roberson 2020-5-6
What is "circ.mean" ?
What form is the time information in? Or is it safe to assume that the data definitely starts on an even 10 minute boundary and is definitely every 1 minute?
Ana Soph
Ana Soph 2020-5-6
hi, thanks for answering, about your questions...
  1. circ_mean is Mean direction of a sample of circular data (this is what i need)
  2. Yes, is safe to assume that the data definitely starts on an even 10 minute boundary and is definitely every 1 minute
i am waiting your answer, thanks (:

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Ana Soph
Ana Soph 2020-5-7
The final script is:
M = xlsread('Dic2019','Dic2019mat')
ten_minute_avarege = meanangle(reshape(M, 10, []), 'omitnan')
A = ten_minute_avarege';
for i=1:length(A)
if A(i)<0, A(i)=A(i)+360; end
end
A = A(:,1);
A = reshape(A,144,length(A)/144);
xlswrite('datosexcel1.xlsx', A', 'Hoja1', 'A1')
thanks all! :D
  8 个评论
显示 6更早的评论
Walter Roberson
Walter Roberson 2020-5-7
It should work with numeric values, including values that might include nan.
It just is not an intended way of calling meanangle. But it will work because meanangle was sloppy in not checking that the parameters were what the function expected.

请先登录，再进行评论。

更多回答（1 个）

Walter Roberson
Walter Roberson 2020-5-6
If you can be sure that the data starts on a 10-minute boundary and that there is no missing data, then
ten_minute_avarege = mean(reshape(WindData, 10, []), 'omitnan')
If you are sure you have no nan entries, then you can leave out the 'omitnan'
  8 个评论
显示 6更早的评论
Walter Roberson
Walter Roberson 2020-5-7
You have to download the code from the File Exchange, and unzip it into its own directory that is not under the MATLAB installation directory. Then use pathtool to add that directory to the path, and save.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by