StatsCircularMeans

Share icon

Hello, I am a relatively new IGOR user and I need to use the StatsCircularMeans function to find the mean of some wind direction data. I am struggling to understand how to perform this analysis (such as how to create a two column wave). Any help or guidance on how to use the StatsCircularMean function would be greatly appreciated.
Steph
puglie12 wrote:
Hello, I am a relatively new IGOR user and I need to use the StatsCircularMeans function to find the mean of some wind direction data. I am struggling to understand how to perform this analysis (such as how to create a two column wave). Any help or guidance on how to use the StatsCircularMean function would be greatly appreciated.
Steph


It is not clear to me that you need to use StatsCircularMeans.

If you just have "direction data" I interpret that as angles only. If that is the case you should look at StatsCircularMoments, which requires a 1D input wave and you can specify the format of the input data with the /MODE flag.

If you have different kind of data then it would be helpful if you provided more details.

A.G.
WaveMetrics, Inc.

May 17, 2013 at 10:34 am - Permalink

Igor wrote:
puglie12 wrote:
Hello, I am a relatively new IGOR user and I need to use the StatsCircularMeans function to find the mean of some wind direction data. I am struggling to understand how to perform this analysis (such as how to create a two column wave). Any help or guidance on how to use the StatsCircularMean function would be greatly appreciated.
Steph


It is not clear to me that you need to use StatsCircularMeans.

If you just have "direction data" I interpret that as angles only. If that is the case you should look at StatsCircularMoments, which requires a 1D input wave and you can specify the format of the input data with the /MODE flag.

If you have different kind of data then it would be helpful if you provided more details.

A.G.
WaveMetrics, Inc.


Hello,
Yes my wind direction data is in angles but I also will be using other waves such as temperature or concentration data. So not all my waves are in angles. That was why I thought I required StatsCircularMeans.

May 17, 2013 at 01:26 pm - Permalink

puglie12 wrote:

Yes my wind direction data is in angles but I also will be using other waves such as temperature or concentration data. So not all my waves are in angles. That was why I thought I required StatsCircularMeans.


Sorry, no. StatsCircularMeans takes as an input a two-column wave where each row contains a mean-angle value and a radius. This would be equivalent to say mean angle and wind speed; values which were themselves obtained by averaging (hence the word "mean"). If I am guessing right, you are looking for first order statistics. StatsCircularMeans is second order.

AG

May 17, 2013 at 02:33 pm - Permalink