Re: [idvusers] Adding two different 4d grids

Did you try this:

def simpleAdd(F1,F2):
    return F1 + F2


Ken


________________________________
 From: Paul Graham <meteorpaul@xxxxxxxxx>
To: idvusers@xxxxxxxxxxxxxxxx 
Sent: Tuesday, August 27, 2013 12:26 PM
Subject: Re: [idvusers] Adding two different 4d grids
 

Hi Don,

The first method generates a "visad.UnitException".  The second one (with
noUnit) generates "java.lang.NullPointerException".  Any ideas as to what
can be done?

Thanks,

Paul


On 28 August 2013 08:25, Paul Graham <meteorpaul@xxxxxxxxx> wrote:

> Hi Don,
>
> The first method generates a "visad.UnitException".  The second one (with
> noUnit) generates "java.lang.NullPointerException".  Any ideas as to what
> can be done?
>
> Thanks,
>
> Paul
>
>
> On 27 August 2013 23:19, Don Murray (NOAA Affiliate) 
> <don.murray@xxxxxxxx>wrote:
>
>> I would expect that the second one would work.  What errors do you get?
>>
>> Don
>>
>>
>> On 8/26/13 8:49 PM, Paul Graham wrote:
>>
>>> Dear IDV Users,
>>>
>>> What is the best way to add two different 4d grids (ie. having different
>>> units) in order to create dimensionless field?
>>>
>>> Eg.  Suppose, for whatever reason, you wanted to add convective available
>>> potential energy (CAPE), F1, and rainfall rate, F2.
>>>
>>> I have not been able to get either of the following to work (IDV produces
>>> errors):
>>>
>>> def simpleAdd(F1,F2):
>>>    res = add(F1,F2)
>>>    return res
>>>
>>> def simpleAdd(F1,F2):
>>>    res = add(noUnit(F1),noUnit(F2))
>>>    return res
>>>
>>> What should I do?
>>>
>>> Thanks,
>>>
>>> Paul
>>> ______________________________**_________________
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>>>
>>>
>> --
>> Don Murray
>> NOAA/ESRL/PSD and CIRES
>> 303-497-3596
>> http://www.esrl.noaa.gov/psd/**people/don.murray/<http://www.esrl.noaa.gov/psd/people/don.murray/>
>>
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>
>
>
>
> --
>
>
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