SAVE in EOF analysis

[Boyin Huang <huang_boyin@xxxxxxxxx>]

Hi, ferreters:

Is the ferret so slow in doing EOF analysis?

Using the demo file for eof analysis:

-------------------------------------------------------
SET REGION/X=67w:1w/Y=11S:11N
USE coads_climatology
LET eof_xyfcn = eof_space(sst, 0.5)
SAVE/CLOBBER/FILE=sst_clim_eof_space.cdf eof_xyfcn

USE sst_clim_eof_space.cdf
SET VIEW ul; fill/l=1/TITLE="eof 1" eof_xyfcn; go land
-------------------------------------------------------

Which works fine to me. Now I wish to have EOF in a
larger domain, say 120E-70W and 40S-50N.

I replaced set region by
SET REGION/X=120e:70w/Y=40S:50N
and added
SET MEMORY/SIZE=260.(my computer memory is 1.5gb).

I found that the ferret runs for ever (how long should
I wait for?).

I tried to diagnose the problem by typing these
command lines interactively line by line, and found
the problem is that the program was stuck by SAVE
command.

I then tried NOT to use the save command, but ferret
says that the variable was not found.

So, do we have to save EOF first, and the read and
plot?

How can I do the EOF analysis within a larger space
domain and long time series? Say, simulated global SST
with 200x100 grids for 1200 month, sst(200,100,1200).



=====
Boyin Huang
The Center for Research on the Changing Earth System (CRCES)
10211 Wincopin Circle, Suite 240
Columbia, Maryland 21044
Tel. 410-992-5300/819 (O), 410-737-4557(H)
Fax. 410-992-5944, Email. byh@crces.org
http://byh.crces.org

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