On Mon, 29 Aug 2005, Chao Luo wrote:
> I have some troubles to reorder the data. I have two dimensional soil
> moisture data. The original data are ordered N->S and start 180. I want
> to reorder latitude from N->S to S->N, and first longitude from 180.0 to
> 0.0.
>
> Thanks for any help offered!
>
> Chao
>
Dear Chao,
First, to reverse the order of a particular dimension, you can use
the (::-1) syntax. For example, if "t" is an array whose dimensions
are lat x lon, and you want to reverse the latitude values, you
would use:
tnew = t(::-1,:)
To additionally reorder your longitude values so that they start at a
different longitude point, you should use the contributed function
"lonPivot":
http://www.ncl.ucar.edu/Document/Functions/Contributed/lonPivot.shtml
You need to load the "contributed.ncl" script to have access to this
function.
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
...
tnew = lonPivot(t(::-1,:),180.)
--Mary
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