RE coordinate subscripting problem

I get a similar behavior using a file with the same latitudes as Seth
running ncl 4.2.0.a033 on a mac. Also 4.2.0.a033 on solaris produces
incorrect results.
Using ncl 4.2.0.a034 on ia64 linux I get the expected nearest
coordinate point. Maybe this
was a bug fix in 4.2.0.a034?

-Jamie

On Apr 12, 2007, at 3:03 PM, ncl-talk-request_at_ucar.edu wrote:

> I am encountering some very strange behavior using variable
> subscripting on some NCEP-II data. If anyone can give me some insight
> into what's going on, I'd appreciate it.
>
> I've attached a script that demonstrates the problem I'm talking and
> the output from that script, but here's a short summary:
>
> I'm running NCL 4.2.0.a033 on a linux machine. I have NetCDF file
> with
> data from the NCEP-II reanalysis (air temperature, in my example, but
> it happens with other files as well).
>
> I'm reading in data with a line like the following:
>
> temp = short2flt(fin->air(time|:, level|0, {lat|LAT}, {lon|LON}))
>
> I'm selecting a single point, so NCL selects the closest value. If I
> slowly change LAT from a value near one point in the latitude
> coordinate variable array (a grid center) to another, the data values
> change when it's halfway between, just as I'd expect.
>
> Here's the weird thing: the data values *also* change when I'm
> changing
> from one side of a grid center to the other, and, moreover, I get a
> third value if my latitude is exactly equal to the grid center
> latitude. This doesn't happen with longitude.
>
> Any ideas what's going on?

_______________________________________________
ncl-talk mailing list
ncl-talk_at_ucar.edu
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Thu Apr 12 2007 - 16:33:59 MDT