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<p class="MsoNormal"><span style="color:#1F497D">Hi Will,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks for your kind help. I figure it out by testing your suggestion 1. In my originally I was trying to give lat2d and lon2d to u10 and v10 (i.e., use u10@lat2d, v10@lat2d), but I did not give u11 and v11 similar
information. I didn’t put this part in my email to NCL help, that’s probably why it’s hard to see why it’s wrong. Now I delete these lines, it works well.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Thanks again,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">Jiali <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Will Hobbs [mailto:will.hobbs@utas.edu.au]
<br>
<b>Sent:</b> Tuesday, December 15, 2015 9:42 PM<br>
<b>To:</b> Wang, Jiali; ncl-talk@ucar.edu<br>
<b>Subject:</b> Re: [ncl-talk] Overlay streamlines on streamlines<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Jiali<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">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). <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">I would suggest that you do one or both of the following:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<span style="font-size:10.5pt">Try and plot both plots separately (i.e. without the overlay), just to check that there's nothing wrong in the input data.<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.5pt">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.<o:p></o:p></span></li></ol>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">Will<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black"><Wang>, Jiali <<a href="mailto:jialiwang@anl.gov">jialiwang@anl.gov</a>><br>
<b>Date: </b>Wednesday, 16 December 2015 10:20 AM<br>
<b>To: </b>"<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>
<b>Subject: </b>[ncl-talk] Overlay streamlines on streamlines<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Dear NCL help,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">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></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">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></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">=====================<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">begin<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> f = addfile("uv10m_01deg_daily_1995.nc","r")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> u = f->U10(:,200:300,500:600)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> v = f->V10(:,200:300,500:600)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> u10 = dim_avg_n(u,0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> v10 = dim_avg_n(v,0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> f1 = addfile("uv10m_01deg_daily_2004.nc","r")<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> u1 = f1->U10(:,200:300,500:600)
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> v1 = f1->V10(:,200:300,500:600)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> u11 = dim_avg_n(u1,0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> v11 = dim_avg_n(v1,0)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> wks = gsn_open_wks("ps","stream_1995_2004") ; open a ps file<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res1 = True ; plot mods desired<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res1@gsnDraw = False<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res1@gsnFrame = False<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res1@stLineColor = "orange" ; changes color<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res2 = True ; plot mods desired<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res2@gsnDraw = False<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res2@gsnFrame = False<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> res2@stLineColor = "black"<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> plot_1 = gsn_csm_streamline(wks,u10,v10,res1)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> plot_2 = gsn_csm_streamline(wks,u11,v11,res2)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> overlay(plot_1,plot_2)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> draw(plot_1)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> frame(wks)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">end<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black">====================================</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black">Jiali Wang, Ph. D</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black">Environmental Science Division</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black">Argonne National Laboratory</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black">Tel: 630-252-2848</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"><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></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
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