[ncl-talk] overlay polyline boundaries for all four subplots in one panel

[LSL]

Thanks Rick,

It works.

LSL

On 2021/9/8 下午10:49, Rick Brownrigg wrote:
> Hi,
>
> I don't know for certain, but you might try making your variable 
> "loess_id", which is assigned from the call to 
> gsn_add_shapefile_polylines(), into an array of type graphic and 
> len=4, just like you do with the variables plot and map.
>
> Hope that helps...
> Rick
>
>
> On Wed, Sep 8, 2021 at 8:22 AM LSL via ncl-talk 
> <ncl-talk at mailman.ucar.edu <mailto:ncl-talk at mailman.ucar.edu>> wrote:
>
>     Dear NCL community,
>
>
>     I have met a problem when overlaying polyline boundary on each
>     contour plots within one panel. It seems that whatever how many
>     sentences with gsn_add_shapefile_polylines added, there is always
>     one boundary on one plot.
>
>
>     How can I add for all four plots? Thanks in advance,
>
>
>     LSL
>
>
>     The script and figure is attached.
>
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