[ncl-talk] list array?

[Dennis Shea]

WK ... thx for replying

One minor alternative .... Rather than

    delete(intensity)
    delete(duration)
    delete(center_lon)
    delete(center_lat)

You can delete multiple variables via

    delete([/intensity, duration, center_lon, center_lat/])


On Wed, Apr 13, 2016 at 9:40 AM, Walter Kolczynski <
walter.kolczynski at noaa.gov> wrote:

> Yongil,
>
> Unfortunately, NCL doesn't support custom structures. The best way might
> be to create a list for the intensity with duration and location as
> attributes. Something like this:
>
> intensityList = NewList("fifo")
> do i=0, nEvents-1, 1
>     <read in data>
>     intensity at duration = duration
>     intensity at center_lon = center_lon
>     intensity at center_lat = center_lat
>     ListPush( intensityList, echo(intensity) )
>     delete(intensity)
>     delete(duration)
>     delete(center_lon)
>     delete(center_lat)
> end do
>
> Where echo is a function I often use with lists that returns an anonymous
> copy so the list retains the variable if it is deleted:
>
> if isdefined("echo") then undef("echo") end if
> function echo(variable)
>     local variable2
>     begin
>     variable2 = variable
>     return variable2
>     end ; echo
>
> The downside to this method is that you can't have metadata on the
> duration or locations. The other option is to create a list for each
> variable, which breaks their connection but allows you to keep the metadata.
>
> - Walter
>
>
> On 2016-04-13 11:24, Sitan Heyl wrote:
>
> Hi, All
>   I want to create an array of blocking event, every event contains
> intensity, duration, center_lon(duration), center_lat(duration). because
> center_lon depends on the duration, so I wonder if there is one method to
> create an array, in which every member is a list to include variable
> (intensity, duration) and array(center_lon,center_lat). I think this is
> similar to structure in C/C++ Language. Any help is welcoming.
>
> Best,
> Yongli
>
>
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