[ncl-talk] How to read files having different dimension sizes

[Wei Huang]

Jiali,

There are two ways to do it:
1. The traditional way

county = (/"Delaware","Sioux","Lincoln"/)



do k = 0, 2

   f1  = addfile("CDL_2010_"+county(k)+".nc","r")

   u1  = f1->Band1(:,:)


 ;do some work with u1


  delete(u1)

end do



2. the easy way

county = (/"Delaware","Sioux","Lincoln"/)



do k = 0, 2

   f1  := addfile("CDL_2010_"+county(k)+".nc","r")

   u1  := f1->Band1(:,:)

end do



Where the second way uses ":=", which we call it re-assign.

It works as, if u1 exists at this time, delete it first, if not, do
nothing, and then create a new u1.


You may want to read:

http://www.ncl.ucar.edu/Document/Language/varb_assign.shtml


Regards,


Wei

================================================
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Phone: 303-497-8924

On Fri, Mar 20, 2015 at 9:21 AM, Wang, Jiali <jialiwang at anl.gov> wrote:

>  Dear NCL users,
>
>
>
> I am trying to read in files which have different dimension sizes, and get
> fatal error: Dimension sizes of left hand side and right hand side of
> assignment do not match.
>
>
>
> Here is my ncl script:
>
> ==============
>
> county = (/"Delaware","Sioux","Lincoln"/)
>
>
>
> do k = 0, 2
>
>    f1  = addfile("CDL_2010_"+county(k)+".nc","r")
>
>    u1  = f1->Band1(:,:)
>
> end do
>
> ===============
>
>
>
> Since the dimension sizes of the three data sets are totally different,
> the script works only for k=0,0 or k=1,1 or k=2,2. Is there a way to
> address this problem? Something like, make it forgets the dimension of last
> loop (say, k=0) and starts the next loop (say, k=1)? I have much more than
> three data sets needed to be read in.
>
>
>
> Thanks!
>
>
>
> Jiali
>
>
>
>
>
> Jiali Wang, Ph. D
>
> Environmental Science Division
>
> Argonne National Laboratory
>
> Tel: 630-252-2848
>
> http://www.evs.anl.gov/about-evs/staff/detail/index.cfm?/Wang/Jiali
>
>
>
>
>
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