<div dir="ltr">Hi:<div><br></div><div>The easiest thing to do is just define your color bar manually, and your intervals not to include 0.  You then set the leftward most color to white.</div><div><br></div><div>I am not sure if there is an easier way.</div><div><br></div><div>Do you need help with this?</div><div><br></div><div>Barry</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 2, 2017 at 3:31 PM, Michael Weston <span dir="ltr">&lt;<a href="mailto:mjweston@masdar.ac.ae" target="_blank">mjweston@masdar.ac.ae</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    <p>Hi <br>
    </p>
    No not really. What line in the code is causing it to be included? <br>
    My understanding from both these lines is that it starts at zero.<br>
    <br>
    res@cnLevels             = fspan(0,1,10)<br>
    ...<span class=""><br>
    res@lbLabelStrings        = (/&quot;0&quot;,&quot;0.1&quot;,&quot;0.2&quot;,&quot;0.3&quot;,&quot;0.4&quot;,
    </span><div bgcolor="#FFFFFF" text="#000000"><span class="">&quot;0.5&quot;,&quot;0.6&quot;,&quot;0.7&quot;,&quot;0.8&quot;,&quot;0.9&quot;,<wbr>&quot;1&quot;/)<br>
      <br></span>
      Mike<br>
    </div><div><div class="h5">
    <br>
    <br>
    <div class="m_-1865265935508319278moz-cite-prefix">On 02/08/2017 16:21, Barry Lynn wrote:<br>
    </div>
    <blockquote type="cite">
      
      <div dir="ltr">Hi:
        <div><br>
        </div>
        <div>Do you really want to include the &lt; 0 part of your color
          bar?</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Wed, Aug 2, 2017 at 2:51 PM, Michael
          Weston <span dir="ltr">&lt;<a href="mailto:mjweston@masdar.ac.ae" target="_blank">mjweston@masdar.ac.ae</a>&gt;</span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div bgcolor="#FFFFFF" text="#000000"> Dear NCL users,<br>
              <br>
              This question has been asked many times. However, I wonder
              if a more elegant solution has been found in the mean
              time.<br>
              E.g subjects in this group, but these do not answer my
              question<br>
              <br>
              Making zero value white in contour plot (Jake Huff)<br>
              Re: Making zero value white in contour plot (Mary Haley)<br>
              Re: Making zero value white in contour plot (Dennis Shea)<br>
              <br>
              I have also tried:<br>
              Getting the colour index (<i>get_color_index</i>), setting
              the colour index to another colour using <i>NhlSetColor</i><i><br>
              </i><br>
              I have tried these links<br>
              &quot;How to coincide zero with the white color of the colo bar
              with uneven numbering&quot;<br>
              <a class="m_-1865265935508319278m_2480953898124925383moz-txt-link-freetext" href="http://mailman.ucar.edu/pipermail/ncl-talk/2014-November/001361.html" target="_blank">http://mailman.ucar.edu/piperm<wbr>ail/ncl-talk/2014-November/<wbr>001361.html</a>
              <br>
              This involves indexing a 256 color palette to the colours
              you want in your 16 level map/color bar. <br>
              <br>
              combined with <br>
              <br>
              <a class="m_-1865265935508319278m_2480953898124925383moz-txt-link-freetext" href="http://www.ncl.ucar.edu/Document/Functions/Built-in/get_color_index.shtml" target="_blank">http://www.ncl.ucar.edu/Docume<wbr>nt/Functions/Built-in/get_<wbr>color_index.shtml</a><br>
              <br>
              However, none have really hit the nail on the head despite
              my efforts. And I imagine this must be much simpler than
              indexing a 256 color scheme.<br>
              <br>
              What I want: <br>
              1. I want to make a map using filled contours, but I want
              zero to be represented by white.<br>
                  I can achieve this by making all zero values missing
              values.<br>
              2. I want to have a color bar next to my map, with zero
              represented by white.<br>
                  I can not achieve this.<br>
              <br>
              My map is attached.<br>
              As you can see it is beautiful, except, I would like to
              get rid of the delightful purple and dark blue in the
              color bar. (i.e. first two classes.)<br>
              <br>
              Is this possible?<br>
              <br>
              Thanks and regards<br>
              Michael<br>
              <br>
              <br>
              general overview of code below<br>
              <br>
                  sfile = addfile(srcFileName,&quot;r&quot;)<br>
                  TMP       = sfile-&gt;var_index<br>
                  TMP = where(TMP.ne.0,TMP,TMP@_FillVa<wbr>lue) ;MAKE
              ZERO MISSING<br>
              <br>
                  res@cnFillOn          = True<br>
                  res@cnFillMode       = &quot;RasterFill&quot;       ; Raster
              Mode<br>
                  res@cnConstFEnableFill = True<br>
                  res@cnLinesOn         = False<br>
                  res@cnLineLabelsOn    = False<br>
              <br>
                  res@cnLevelSelectionMode = &quot;ExplicitLevels&quot;<br>
                  res@cnLevels             = fspan(0,1,10)<br>
                  cmap = read_colormap_file(&quot;BlueYellow<wbr>Red&quot;)<br>
                  res@lbLabelBarOn          = True<br>
                  res@lbLabelStrings        =
              (/&quot;0&quot;,&quot;0.1&quot;,&quot;0.2&quot;,&quot;0.3&quot;,&quot;0.4&quot;,<wbr>&quot;0.5&quot;,&quot;0.6&quot;,&quot;0.7&quot;,&quot;0.8&quot;,&quot;0.9&quot;,<wbr>&quot;1&quot;/)<br>
                  res@lbOrientation         = &quot;Vertical&quot;<br>
                  wks = gsn_open_wks(&quot;png&quot;,&quot;ncl_map&quot;)<br>
                  plot = gsn_csm_contour_map(wks,TMP,re<wbr>s)<br>
                  draw(plot)<br>
                  frame(wks)<br>
                  delete(wks)<br>
              <br>
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                <br>
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        <div><br>
        </div>
        -- <br>
        <div class="m_-1865265935508319278gmail_signature" data-smartmail="gmail_signature">
          <div dir="ltr">Barry H. Lynn, Ph.D
            <div>
              <div>Senior Lecturer,</div>
              <div>
                <div><span style="color:rgb(136,136,136)">The Institute
                    of the Earth Science, </span><br style="color:rgb(136,136,136)">
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                <span style="color:rgb(136,136,136)">Tel: 972 547 231
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            </div>
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      <br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">Barry H. Lynn, Ph.D<div><div>Senior Lecturer,</div><div><div><span style="color:rgb(136,136,136)">The Institute of the Earth Science, </span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">The Hebrew University of Jerusalem, </span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">Givat Ram, Jerusalem 91904, Israel </span><br style="color:rgb(136,136,136)"></div><span style="color:rgb(136,136,136)">Tel: 972 547 231 170</span><br style="color:rgb(136,136,136)"><span style="color:rgb(136,136,136)">Fax: (972)-25662581</span></div></div><div><span style="color:rgb(136,136,136)"><br></span></div><div>C.E.O, Weather It Is, LTD<br>Weather and Climate Focus<br><a href="http://weather-it-is.com" target="_blank">http://weather-it-is.com</a><br>Jerusalem, Israel<br>Local: 02 930 9525<br>Cell: 054 7 231 170<br>Int-IS: x972 2 930 9525<br>US 914 432 3108<br></div></div></div>
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