Re: subtraction function

I agree with Huang. It is not clear what you want to do.
It does sound like conform is what ou need.

If you have:

   x3(Times,lat,lon) and xBase(lat,lon)

   xDiff = x3 - conform(x3, xBase, (/1,2/) )
   copy_VarMeta(x3, xDiff)

http://www.ncl.ucar.edu/Document/Functions/Built-in/conform.shtml

  Good Luck

ph0007@ustc.edu wrote:
> Hi, Jonathan
>
> I'm not really sure what you want to do. I guess the function "conform"
> could help you.
>
> Please see the document about details.
>
> Huang Ping
>
>
> 2010-01-10
> ------------------------------------------------------------------------
> ------------------------------------------------------------------------
> *发件人：* jwsmith
> *发送时间：* 2010-01-10 13:16:56
> *收件人：* ncl-talk
> *抄送：*
> *主题：* [ncl-talk] subtraction function
> Hello ncl
> I see that there is a sum function in ncl. Is there a subtraction
> fuction? I need to subtract a wrfout that contains the average of
> fields from an single wrf model time. The ncbo and ncdiff functions
> in nco did not work because the files contain lat/lon coordinates. Is
> it possible to something like this in ncl?
> Jonathan
> Jonathan Wynn Smith
> Doctoral Student in Howard University
> Program in Atmospheric Sciences (HUPAS)
> 2008 ASP Graduate Student Visitor
> 2006 ASP Summer Colloquium Participant
> 408 Thirkield Building
> 2355 6th St. NW
> Washington, DC 20059
> E-mail: jw_smith@howard.edu or jwsmith9@gmail.com
> Cell Phone: 336-601-4563
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Received on Sun Jan 10 07:52:47 2010