[ncl-talk] changing coordinates

[Kyle Griffin]

Try the lonFlip function. It is designed to do this. While changing the
coordinates is logical, you also must change the actual *data* as well to
be similarly reordered. A simple

extGmean = lonFlip(extGmean)

should work.

https://www.ncl.ucar.edu/Document/Functions/Contributed/lonFlip.shtml


Kyle

----------------------------------------
Kyle S. Griffin
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
Room 1421
1225 W Dayton St, Madison, WI 53706
Email: ksgriffin2 at wisc.edu

On Wed, Jan 28, 2015 at 8:39 PM, Sunmin Park <mireiyue at gmail.com> wrote:

> Dear NCL users
>
> Following question from the previous email that was about problem creating
> figure. As I looked at the original data they had different coordinate.
>
> Is there way that we can change longitude [-180,180] to [0,360]? I am
> trying to compare 4 data sets and one data set has [-180,180] and the
> others have [0,360]. I changed [-180,180] to [0,3600 using
>
>   extGmean!0 = "lat"
>   extGmean!1 = "lon"
>   lat = fspan(-85,85,85)
>   lon = fspan(0,360,72)
>   lat at longname = "latitude"
>   lat at units = "degrees_north"
>   lon at longname ="longitude"
>   lon at units = "degrees_east"
>   extGmean&lat = lat
>   extGmean&lon = lon
>
> but It give wrong plot, looks like changing west and east.
> How I can fix problem?
> Thank you for any comments and helps.
>
> Sun-
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