<p>I evaluate the performance of the model through the computation of statistical parameter such as bias, R, IOA and other. (i compare it with in situ measurements)
However, wind direction (range 0 to 360 in degrees) has difficult characteristics. Thus, I would like to ask if you know statistics tailored to wind direction.</p>
<p>Thanks</p>

CC BY-SA 4.0
2024-03-22T14:56:50.127Z
I've run into this issue with latitude and longitude. I solved that issue by treating them as 3D points on the sphere so there's no issue when longitude changes from -180 to +180 at the antimeridian, and so that the differing width of a degree of longitude isn't an issue. You can do something similar by using x and y coordinates
Barry Carter
CC BY-SA 4.0
2024-03-24T17:32:46.853Z
Probably this might be helpful? https://math.stackexchange.com/questions/44621/calculate-average-wind-direction
dimfalk
CC BY-SA 4.0
2024-03-26T07:52:51.360Z
@BarryCarter if I understand well, you propose to get a circle in cartesian coordinates like sin and cos. Interesting idea. To be fair, the link in mathematics by dimfalk states (and it is logical) that apart from the wind direction, the wind speed as absolute value is also important.
Dimitris Tsiaousidis
CC BY-SA 4.0
2024-03-26T07:54:54.273Z
@dimfalk yes, thanks, the idea of the vector is interesting, but mean value is proposed. I want to evaluate the performance of a model, thus I do need something more. But, I could use the idea of the vector, with other ways.
Dimitris Tsiaousidis
CC BY-SA 4.0
2024-03-26T13:48:11.573Z
@DimitrisTsiaousidis Yes, that's one way to solve the "discontinuity at 0/360" issue
Barry Carter
<wind><statistics>
Wind direction statistics
Dimitris Tsiaousidis
# Wind direction statistics

(Asked by: username_0 on 2024-03-22)

I evaluate the performance of the model through the computation of statistical parameter such as bias, R, IOA and other. (i compare it with in situ measurements)
However, wind direction (range 0 to 360 in degrees) has difficult characteristics. Thus, I would like to ask if you know statistics tailored to wind direction.

Thanks

**Tags:** wind, statistics

> **Comments:**
> **username_1**: I've run into this issue with latitude and longitude. I solved that issue by treating them as 3D points on the sphere so there's no issue when longitude changes from -180 to +180 at the antimeridian, and so that the differing width of a degree of longitude isn't an issue. You can do something similar by using x and y coordinates  
> **username_2**: Probably this might be helpful? https://math.stackexchange.com/questions/44621/calculate-average-wind-direction  
> **username_0**: @username_1 if I understand well, you propose to get a circle in cartesian coordinates like sin and cos. Interesting idea. To be fair, the link in mathematics by username_2 states (and it is logical) that apart from the wind direction, the wind speed as absolute value is also important.  
> **username_0**: @username_2 yes, thanks, the idea of the vector is interesting, but mean value is proposed. I want to evaluate the performance of a model, thus I do need something more. But, I could use the idea of the vector, with other ways.  
> **username_1**: @username_0 Yes, that's one way to solve the "discontinuity at 0/360" issue  

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## 0 answers

