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    <p>Hi Kalyan,</p>
    <p>There are a lot of missing data in your file, so that might be
      why contours/shading doesn't show up.  If you use "set gxout
      grfill" before "d thick" you can see all the valid grid cells. 
      Also note that your longitude values are somewhat unconventional
      and run from -220 -0.4375 (140E to 0), so make sure your "set lon
      x1 x1" is within that range.</p>
    <p>Jim<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 1/31/17 3:31 PM, kalyan chakravarthy
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAA6N+5tO=jHsNfUaYjLpUttdQcQt0Vx9=-j6xEtg1gCwJZmWfw@mail.gmail.com"
      type="cite">
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        <div class="gmail_default" style="font-family:courier
          new,monospace">Hi Everyone,</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">By using NARR data, I am trying to plot the
          thickness between 500-1000mb levels. I am having an ctl file
          to open the grib file. </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">I have used the following commands to read and
          plot the file</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">Open model.ctl</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">set lat y1 y2</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">set lon x1 x2</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">define thick=HGTprs(lev=500)-HGTprs(lev=1000)</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">d thick</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">But I didn't see any shaded or contours drawn.
          Can anyone helpme with the problem. </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">I have attached the data files.</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace"><br>
        </div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">Thanks in advance</div>
        <div class="gmail_default" style="font-family:courier
          new,monospace">Kalyan​
          <div class="gmail_chip gmail_drive_chip"
style="width:396px;height:18px;max-height:18px;background-color:rgb(245,245,245);padding:5px;color:rgb(34,34,34);font-family:arial;font-style:normal;font-weight:bold;font-size:13px;border:1px
            solid rgb(221,221,221);line-height:1"><a
              moz-do-not-send="true"
href="https://drive.google.com/file/d/0B5GylLRnzAPJeFBpUDNPOFc3aGM/view?usp=drive_web"
              target="_blank"
style="display:inline-block;max-width:366px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px
              0;border:none"><img moz-do-not-send="true"
                style="vertical-align: bottom; border: none;"
src="https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png"> <span
                dir="ltr"
                style="color:rgb(17,85,204);text-decoration:none;vertical-align:bottom">model.ctl</span></a><img
              moz-do-not-send="true"
              src="//ssl.gstatic.com/ui/v1/icons/common/x_8px.png"
              style="opacity: 0.55; cursor: pointer; float: right;
              position: relative; top: -1px; display: none;"></div>
          ​​
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style="width:396px;height:18px;max-height:18px;background-color:rgb(245,245,245);padding:5px;color:rgb(34,34,34);font-family:arial;font-style:normal;font-weight:bold;font-size:13px;border:1px
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              moz-do-not-send="true"
href="https://drive.google.com/file/d/0B5GylLRnzAPJaG4tMTd5YkpxWTg/view?usp=drive_web"
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style="display:inline-block;max-width:366px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px
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                style="vertical-align: bottom; border: none;"
src="https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png"> <span
                dir="ltr"
                style="color:rgb(17,85,204);text-decoration:none;vertical-align:bottom">narr-a_221_20100927_0600_000.grb</span></a><img
              moz-do-not-send="true"
              src="//ssl.gstatic.com/ui/v1/icons/common/x_8px.png"
              style="opacity: 0.55; cursor: pointer; float: right;
              position: relative; top: -1px; display: none;"></div>
          ​​
          <div class="gmail_chip gmail_drive_chip"
style="width:396px;height:18px;max-height:18px;background-color:#f5f5f5;padding:5px;color:#222;font-family:arial;font-style:normal;font-weight:bold;font-size:13px;border:1px
            solid #ddd;line-height:1"><a moz-do-not-send="true"
href="https://drive.google.com/file/d/0B5GylLRnzAPJWHBOQjRGMFJwZlU/view?usp=drive_web"
              target="_blank"
style="display:inline-block;max-width:366px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-decoration:none;padding:1px
              0;border:none"><img moz-do-not-send="true"
                style="vertical-align: bottom; border: none;"
src="https://ssl.gstatic.com/docs/doclist/images/icon_10_generic_list.png"> <span
                dir="ltr"
                style="color:#15c;text-decoration:none;vertical-align:bottom">narr-a_221_20100927_hh00_000.idx</span></a><img
              moz-do-not-send="true"
              src="//ssl.gstatic.com/ui/v1/icons/common/x_8px.png"
              style="display:none; opacity: 0.55; cursor: pointer;
              float: right; position: relative; top: -1px; "></div>
          ​</div>
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      <pre wrap="">_______________________________________________
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    </blockquote>
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