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Aggregate timeseries data to solstices and equinoxes.

09 Jun 2009

Aggregates serial datetime data to summer/winter solstices, and spring/fall equinoxes.

File Information
Description	accumSeasonTS- aggregate timeseries to solstices and equinoxes Using G. Cardillo function to compute solstices and equinoxes, this function will aggregate time series data (e.g. Precipitation) to seasonally summarized results. To accomplish this three core functions are used: eqnsol, unique, and accumarray. The rest of the function is manipulating data to pass around in between the functions. This function will output cumulative seasonal totals of data. It's application is limited default parameterization of ACCUMARRAY matlab function (i.e. sum totals). It's certainly possible to modify this function to allow the user to apply different statistics in the ACCUMARRAY function, but not done here. Additionally, this function uses another function (EQNSOL) to calculate the summer/winter solstices and spring/fall equinoxes per year, then sum up the data within each season. Function does not discriminate on partial seasons. Partial seasons that are either because of beginning or ending dates, or because of missing data are not censored. Partial seasons will be output along with all complete seasons. It's up to the user to either pre-process the data or post process the results. Expected inputs is a timeseries of data in two columns: a decimal date, and the values to be accumulated. datain = n x 2 datain(:,1) = decimal date/time datain(:,2) = values to sum by season fn = supplied string specifying a valid summary statistic function. Example: @sum, @max, @min, etc. dataout = n x 2 dataout(:,1) = decimal date/time of the start of the season dataout(:,2) = values summed for the season Acknowledgements: Cardillo G. (2007) Equinoxes and Solstices: compute the date and time of equinoxes and solstices. http://www.mathworks.com/matlabcentral/fileexchange/17977 Written by: Jeff Burkey King County- DNRP email: jeff.burkey@kingcounty.gov May 30, 2009 Syntax: [dataout] = accumSeasonTS(datain,fn)
Acknowledgements	The author wishes to acknowledge the following in the creation of this submission: Equinoxes and Solstices
MATLAB release	MATLAB 7.8 (R2009a)
Zip File Content
Other Files	accumSeasonTS.m, license.txt

Tags for This File
Everyone's Tags	aggregation, aggregation function, equinox, equinoxes, seasonal, solstice, solstices, statistics
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Tag Activity for this File
Tag	Applied By	Date/Time
statistics	Jeff Burkey	10 Jun 2009 09:28:55
seasonal	Jeff Burkey	10 Jun 2009 09:28:55
aggregation	Jeff Burkey	10 Jun 2009 09:28:55
aggregation function	Jeff Burkey	10 Jun 2009 09:28:55
solstices	Jeff Burkey	10 Jun 2009 09:28:55
solstice	Jeff Burkey	10 Jun 2009 09:28:55
equinoxes	Jeff Burkey	10 Jun 2009 09:28:55
equinox	Jeff Burkey	10 Jun 2009 09:28:55

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