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<div>Jiali</div>
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<div>I cannot see anything in your code or in the streamlinePlort class documentation (<a href="https://www.ncl.ucar.edu/Document/HLUs/Classes/StreamlinePlot.shtml">https://www.ncl.ucar.edu/Document/HLUs/Classes/StreamlinePlot.shtml</a>) that explains why you
are not getting the expected output (although someone else might know better). </div>
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<div>I would suggest that you do one or both of the following:</div>
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<li>Try and plot both plots separately (i.e. without the overlay), just to check that there's nothing wrong in the input data.</li><li>Try and retain the coordinate data when you average both data files (i.e. use dim_avg_n_Wrap()); this will ensure that both plots have the same plot domain.</li></ol>
<div>Will</div>
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<span style="font-weight:bold">From: </span><Wang>, Jiali <<a href="mailto:jialiwang@anl.gov">jialiwang@anl.gov</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, 16 December 2015 10:20 AM<br>
<span style="font-weight:bold">To: </span>"<a href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a>" <<a href="mailto:ncl-talk@ucar.edu">ncl-talk@ucar.edu</a>><br>
<span style="font-weight:bold">Subject: </span>[ncl-talk] Overlay streamlines on streamlines<br>
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<p class="MsoNormal">Dear NCL help,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am trying to make a plot with one set of streamline overlaid on another set of streamline. But I was not able to figure it out. I can only get the first set of streamline (as attached).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I copy the main part of my code below. Could you please take a look and give advice? Thanks for your time! -Jiali<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">=====================<o:p></o:p></p>
<p class="MsoNormal">load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"<o:p></o:p></p>
<p class="MsoNormal">load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">begin<o:p></o:p></p>
<p class="MsoNormal"> f = addfile("uv10m_01deg_daily_1995.nc","r")<o:p></o:p></p>
<p class="MsoNormal"> u = f->U10(:,200:300,500:600) <o:p></o:p></p>
<p class="MsoNormal"> v = f->V10(:,200:300,500:600)<o:p></o:p></p>
<p class="MsoNormal"> u10 = dim_avg_n(u,0)<o:p></o:p></p>
<p class="MsoNormal"> v10 = dim_avg_n(v,0)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> f1 = addfile("uv10m_01deg_daily_2004.nc","r")<o:p></o:p></p>
<p class="MsoNormal"> u1 = f1->U10(:,200:300,500:600) <o:p></o:p></p>
<p class="MsoNormal"> v1 = f1->V10(:,200:300,500:600)<o:p></o:p></p>
<p class="MsoNormal"> u11 = dim_avg_n(u1,0)<o:p></o:p></p>
<p class="MsoNormal"> v11 = dim_avg_n(v1,0)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> wks = gsn_open_wks("ps","stream_1995_2004") ; open a ps file<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> res1 = True ; plot mods desired<o:p></o:p></p>
<p class="MsoNormal"> res1@gsnDraw = False<o:p></o:p></p>
<p class="MsoNormal"> res1@gsnFrame = False<o:p></o:p></p>
<p class="MsoNormal"> res1@stLineColor = "orange" ; changes color<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> res2 = True ; plot mods desired<o:p></o:p></p>
<p class="MsoNormal"> res2@gsnDraw = False<o:p></o:p></p>
<p class="MsoNormal"> res2@gsnFrame = False<o:p></o:p></p>
<p class="MsoNormal"> res2@stLineColor = "black"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"> plot_1 = gsn_csm_streamline(wks,u10,v10,res1)<o:p></o:p></p>
<p class="MsoNormal"> plot_2 = gsn_csm_streamline(wks,u11,v11,res2)<o:p></o:p></p>
<p class="MsoNormal"> overlay(plot_1,plot_2)<o:p></o:p></p>
<p class="MsoNormal"> draw(plot_1)<o:p></o:p></p>
<p class="MsoNormal"> frame(wks)<o:p></o:p></p>
<p class="MsoNormal">end<o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; ">====================================<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; ">Jiali Wang, Ph. D<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; ">Environmental Science Division<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; ">Argonne National Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; ">Tel: 630-252-2848<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><a href="http://www.evs.anl.gov/about-evs/staff/detail/index.cfm?/Wang/Jiali">http://www.evs.anl.gov/about-evs/staff/detail/index.cfm?/Wang/Jiali</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 12pt; font-family: 'Times New Roman', serif; "><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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