Re: subtraction function

co(Time, bottom_top, south_north, west_east)

I want to take a ten - day average of co at 12z. I then want to
subtract this average from the individual 12 z time in that period.
This will be the anamolous field. I want to make a vertical cross
section of the anamolies.

When I did the subtraction in nco using ncbo and ncdiff. The
difference of co was taken, but it also seems to have taken the
difference of the XLAT and XLON. I think this happened because co is a
variable with lat/lon (bottom_top) coordinates, (I could be
misinterpreting the use of ncdiff and ncbo).

Hencem I was asking if the subtraction could be done in ncl. I hope I
have provided more clarity this time.

Thanks,
Jonathan

Quoting Dennis Shea <shea@ucar.edu>:

> 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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>
>

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 14:25:56 2010