Re: [ferret_users] How can I produce a time series of JJA averages (orother intervals) from a monthly time series?

To: ansley.b.manke@xxxxxxxx, oar.pmel.ferret_users@xxxxxxxx

Subject: Re: [ferret_users] How can I produce a time series of JJA averages (orother intervals) from a monthly time series?

From: Yun.Li@xxxxxxxx

Date: Tue, 19 Sep 2006 12:57:23 +0800

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Thread-topic: [ferret_users] How can I produce a time series of JJA averages(or other intervals) from a monthly time series?

Dear Ferreters,

I am trying to produce a seasonal time series (such as JJA time series) from a monthly time series.

There is an example from the Ferret FAQ on "How can I produce a time series of annual averages (or other intervals) from a monthly time series?"

http://ferret.wrc.noaa.gov/Ferret/FAQ/analysis/annual_from_monthly.html

I would be most grateful if you can let me know how to produce a seasonal averaged time series (such as June-July-August average time series) from a monthly time series by modifying the code used to produce annual time series in the above web page, that is,

yes? SET DATA monthly_navy_winds

yes? DEFINE AXIS/EDGES/T0=1-jan-1900/UNITS=days tann82_92 = DAYS1900(X[i=1982:1993:1],1,1)

yes? PLOT/X=180/Y=0 uwnd

yes? PLOT/X=180/Y=0/over uwnd[gt=tann82_92@ave] ! the above plot

Thanks,

Yun Li

CSIRO, Australia