[ncl-install] [ncl-talk] Data processing problem

[Jiang, Lifen]

Hi Dennis,

Thank you for your reply!

When I delete "(::5,::10)", the numbers of lat and lon are right but still have wrong names like this and cann't read by Panoply :




I never changed the names for lat and lon. I really don't know what had happened to this.

Thank you in advance for your time if you can take a look at this.

Lifen 


2013-02-13 



Jiang, Lifen 



发件人： Dennis Shea 
发送时间： 2013-02-12  22:03:33 
收件人： Jiang, Lifen 
抄送： ncl-talk at ucar.edu 
主题： Re: [ncl-talk] Data processing problem 
 
The data on the *file* may be 1676 x 4320
BUT you sub-sampled the data (decimated)
t  = short2flt(in->med_c0(::5,::10))
decimates the lat dimension to 1/5 the original size (1676/5)
and
decimates the lon dimension to 1/10 the original size (4320/10)
-----
If you want to retain the original dimensions
t  = short2flt(in->med_c0)     ; read all the data
Good Luck


On 2/12/13 8:51 PM, Jiang, Lifen wrote:
> Hello,
> I have a data set with two dimensions: lat=1676 and lon=4320; Variable type is short; Missing data are -32768 but many values of -9999 and -9998 should also be treated as missing values.
> I want to divide all values by 10 but the returned result has two dimensions: nc10=336 and nc11=432 instead of lat=1676 and lon=4320. And I can’t plot it at all.
> I greatly appreciate if anyone can help check what’s wrong with my scripts as bellow.
> Regards,
> Lifen
> **************************************************************************
>      load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>
>      in = addfile("med_c0.nc",  "r")
>
>
>      t  = short2flt(in->med_c0(::5,::10))  ; convert to float
>      t at _FillValue  = -32768
>      t at missing_value = t at _FillValue
>      t = where(t .lt. -9997, t at _FillValue, t)
>
>      y  = t/10
>      printVarSummary(y)
>
>
>      system("/bin/rm -f med_c0_kgm-2.nc")
>      fout         = addfile("med_c0_kgm-2.nc", "c")   ; new netCDF file
>      fout at title   = "kg/m2"
>      fout->y   = y
>
>
>
>
>
>
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