how to use AVE to get yearly time serial?

[Charles Seman]

Hi dongdong,

I'm not sure if this will help, but one thing you could try is this:

'set t 1 522'
'define zyear = ave(Zprs,t+0,t+11)'

"zyear" would now have 522 time levels, each time level containing a
forward yearly average from the current time level.

Please also see: http://grads.iges.org/grads/gadoc/variable.html#new

I hope this helps,
Chuck

dongdong wrote:

> Hello everyone,
> I want tofind relationsofprecipitation and 500mb pressure. Because
> theyare from files with different serial and diffenent time stride,I
> didn't know how to adjust then. Anyhelp will begreatly appreciated!
> precipitation is yearly,from1950 to 2000, however, pressure is monthly
> 1957.9.1 ~ 2002.8.1.
> Iplan to calculate yearly pressure first, myscript is:
> 'open /chdd/work4/grads_used/pressure.ctl'
> 'set lat 0 90'
> 'set lev 500'
> t=5
> while(t<522)
> 'set t ' t
> 'define zyear=ave(Zprs,t=' t ',t=' t '+12,-b)'
> t=t+12
> endwhile
> yet, It is wrong Whenever I set time dimension, zyear always showing
> the same value. what's more, zyear havevalue even at times i didn't
> define. such as t=1 ( t=1 refer to1957.9.1)
> Canyou help megetaveragedpressureat times consistent with
> precipitation, and use TCORR to find theirspace pattern?
> the two control files are in attachment.
> Thank you for your caring,May you all the best!!!
>
> __________________________________________________
> 赶快注册雅虎超大容量免费邮箱?
> http://cn.mail.yahoo.com
>

--

********************************************************************
 Charles Seman                                charles.seman at noaa.gov
 U.S. Department of Commerce / NOAA / OAR
 Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
 201 Forrestal Road                              fax: (609) 987-5063
 Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
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