<div dir="ltr"><div>Hi,</div><div><br></div><div>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.</div><div><br></div><div>Hope that helps...</div><div>Rick</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 8, 2021 at 8:22 AM LSL via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p> </p>
<p style="margin-bottom:0in;line-height:100%">Dear NCL
community,</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">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. <br>
</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">How can I add for
all four plots? Thanks in
advance,
</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">LSL</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">The script and
figure is attached.</p>
<p>
</p>
</div>
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