Problem with ut_inv_calendar

Dear NCL users,

I noted a difference in the functioning of the *ut_inv_calendar* function
between 5.1.1 and 5.2.0 NCL versions. Please see the example below:

1) for 5.1.1 version:

ncl 0> dataStorm = (/2004,02,27,23/)
ncl 1> idxStorm = ut_inv_calendar( dataStorm(0), dataStorm(1), dataStorm(2),
dataStorm(3), 0, 0,"hours since 2004-02-25 00:00:0.0",0)
ncl 2> print(idxStorm)

Variable: idxStorm
Type: double
Total Size: 8 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
Number Of Attributes: 2
  calendar : standard
  units : hours since 2004-02-25 00:00:0.0
(0) 71

2) for 5.2.0 version, the same result from *print(idxStorm)*:

Variable: idxStorm
Type: double
Total Size: 8 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
Number Of Attributes: 2
  calendar : standard
  units : hours since 2004-02-25 00:00:0.0
(0) 70.99999999999997

Why there is this difference? Is it caused by UDUNITS 2 in NCL 5.2.0?
I don't understand this difference since I'm not dealing with minutes and
seconds which will give me a non integer result.

With 5.1.1 NCL version, I could apply *doubletoint* directly to the result
of the *ut_inv_calendar* and use it to obtain an element of an array.
Now, with 5.2.0 I have to add more instructions to convert it correctly to
integer type, since *doubletoint* truncates it giving me a wrong result.

Best regards,

-- 
Mateus da Silva Teixeira
Registered Linux User #466740 (http://counter.li.org/)

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Received on Sat Jul 17 18:55:52 2010