windavg#
[windvelavg, winddiravg] = windavg(windvel, winddir, NPointsAvg, NPointsInterval, dispout)
Description#
Average wind velocity and wind direction
Inputs#
- windvel
Wind velocity time series data
- winddir
Wind direction time series data in (degree)
- NPointsAvg=length(windvel(:,1));
Number of data points from start of each section (interval) to be averaged
- NPointsInterval=length(windvel(:,1));
Number of points that each section (interval) has
- dispout=’no’;
Define to display outputs or not (‘yes’: display, ‘no’: not display)
Outputs#
- windvelavg
Averaged wind velocity data
- winddiravg
Averaged wind direction data in (degree)
Examples#
windvel(:,1)=10.*rand(10,1);
winddir(:,1)=45.*rand(10,1);
[windvelavg,winddiravg]=windavg(windvel,winddir);
windvel(:,1)=10.*rand(5*60,1); %One data point every minute for 5 hours
winddir(:,1)=225.*rand(5*60,1); %One data point every minute for 5 hours
[windvelavg,winddiravg]=windavg(windvel,winddir,10,60,'yes');
References#
Yamartino, R. J. (1984). A comparison of several “single-pass” estimators of the standard deviation of wind direction. Journal of Climate and Applied Meteorology, 23(9), 1362-1366.