Since we're getting such great NcML tips on the weekend, here's a
"Everything you've wanted to know about NcML, but were afraid to ask"
question I've had: Is it possible to use other variables and
mathematic operators to describe the new variable? For instance, what
if I wanted to serve a vector magnitude variable, but my netCDF file
only contains u & v component of velocity.
Thanks,
Tom
On Sun, Jan 20, 2013 at 7:27 AM, Roy Mendelssohn - NOAA Federal
<roy.mendelssohn@xxxxxxxx> wrote:
> Thanks. Perfect. I will give that a try.
>
> -Roy
>
> On Jan 20, 2013, at 7:24 AM, "Signell, Richard" <rsignell@xxxxxxxx> wrote:
>
>> Roy,
>> Definitely. Since you already have the "altitude" variable, all you
>> have to do in NcML is specify the value, which will override what is
>> in the dataset:
>>
>> <variable name="altitude" >
>> <values> 1.0 </values>
>> </variable>
>>
>> BTW, if you had to replace values that were supposed to be uniformly
>> spaced, you can use the start and increment, for example:
>>
>> <variable name="altitude" >
>> <values start="10.0" increment="2.5"/>
>> </variable>
>>
>> -Rich
>>
>> On Sat, Jan 19, 2013 at 5:47 PM, Roy Mendelssohn - NOAA Federal
>> <roy.mendelssohn@xxxxxxxx> wrote:
>>> Hi All:
>>>
>>> I know NcML when used with the TDS can define a new dimension variable and
>>> give it values. But can NcML also be used to change the value of a
>>> dimension variable? Say I have a dimension variable altitude with a single
>>> value 0, and I want to have the extracted values shown be 1, can I do that
>>> in NcML.
>>>
>>> Or barring that, is there a good command line tool that will the same in a
>>> script? Unless I am misunderstanding, while nco can do this by writing out
>>> a new file, I need to do it in place. However, the preferred alternative
>>> right now would be to do ti with NcML in the catalog.xml file if there is
>>> way to do so.
>>>
>>> Thanks,
>>>
>>> -Roy
>>>
>>>
>>> **********************
>>> "The contents of this message do not reflect any position of the U.S.
>>> Government or NOAA."
>>> **********************
>>> Roy Mendelssohn
>>> Supervisory Operations Research Analyst
>>> NOAA/NMFS
>>> Environmental Research Division
>>> Southwest Fisheries Science Center
>>> 1352 Lighthouse Avenue
>>> Pacific Grove, CA 93950-2097
>>>
>>> e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
>>> voice: (831)-648-9029
>>> fax: (831)-648-8440
>>> www: http://www.pfeg.noaa.gov/
>>>
>>> "Old age and treachery will overcome youth and skill."
>>> "From those who have been given much, much will be expected"
>>> "the arc of the moral universe is long, but it bends toward justice" -MLK
>>> Jr.
>>>
>>> _______________________________________________
>>> thredds mailing list
>>> thredds@xxxxxxxxxxxxxxxx
>>> For list information or to unsubscribe, visit:
>>> http://www.unidata.ucar.edu/mailing_lists/
>>
>>
>>
>> --
>> Dr. Richard P. Signell (508) 457-2229
>> USGS, 384 Woods Hole Rd.
>> Woods Hole, MA 02543-1598
>
> **********************
> "The contents of this message do not reflect any position of the U.S.
> Government or NOAA."
> **********************
> Roy Mendelssohn
> Supervisory Operations Research Analyst
> NOAA/NMFS
> Environmental Research Division
> Southwest Fisheries Science Center
> 1352 Lighthouse Avenue
> Pacific Grove, CA 93950-2097
>
> e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
> voice: (831)-648-9029
> fax: (831)-648-8440
> www: http://www.pfeg.noaa.gov/
>
> "Old age and treachery will overcome youth and skill."
> "From those who have been given much, much will be expected"
> "the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
>
> _______________________________________________
> thredds mailing list
> thredds@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe, visit:
> http://www.unidata.ucar.edu/mailing_lists/
