[gradsusr] Script Problems

[Stephen McMillan]

Ron,
Actually, as I mentioned earlier, you can do it with the "if" UDF, although
I don't believe it's part of the official COLA package.  It functions
similarly to the const and maskout combination, but I find "if" is simpler
to use.
Steve Mc

On Fri, Oct 22, 2010 at 11:30 AM, Goodson,Ron [Edm] <Ron.Goodson at ec.gc.ca>wrote:

>  Beyond int vs floats .. 'm assuming hgt0deg is some grid, and you want to
> set the MinCAPE in the grid .. not some single point-value.  If so, you will
> have to use a combination of const() and maskout() to do this .. as shown in
> the documentation under the const function
>
> cheers
>
> ron
>
>
>
>  ------------------------------
> *From:* gradsusr-bounces at gradsusr.org [mailto:
> gradsusr-bounces at gradsusr.org] *On Behalf Of *Stephen McMillan
> *Sent:* October 22, 2010 9:10 AM
> *To:* GrADS Users Forum
> *Subject:* Re: [gradsusr] Script Problems
>
> Andrew,
> Is it critical to have the resulting defined field as integers?  If not,
> you could do something like this, if your GrADS has the "if" conditional UDF
> (such as in the opengrads version):
>
> 'define MinCAPE=1.4*hgt0deg-5400'
> 'define MinCAPE=if(MinCAPE,<,200,200,MinCAPE)'
>
> Then, when you display MinCAPE, all areas < 200 from first define should
> show up as 200.
>
> Steve Mc
>
> On Fri, Oct 22, 2010 at 12:08 AM, Andrew Revering <andy at f5data.com> wrote:
>
>>  This is a simple but annoying problem… I have an equation in a script…
>>
>>
>>
>> 'define MinCAPE = math_int(1.4 * hgt0deg - 5400)'
>>
>> if (MinCAPE < 200) ; MinCAPE = 200 ; endif
>>
>>
>>
>>
>>
>>
>>
>> I get an error saying math_int() is not a valid function….
>>
>> also the whole IF statement is completely ignored. No matter what I do, I
>> still get negative values for MinCAPE.
>>
>>
>>
>> BTW…this is a unconventional method for me to determine if there is
>> 'enough' CAPE to support a severe thunderstorm given the freezing level
>> height in case anyone is wondering.
>>
>>
>>
>> Andrew Revering
>>
>> Convective Development, Inc.
>>
>> http://www.convectivedevelopment.com/
>>
>>
>>
>>
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>>
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