<div dir="ltr">Griff:<div><br></div><div>Thank you for your suggestion.</div><div><br></div><div>I will need that particular NCL script to continue to plot data beyond the time of the missing file. I assume that Guido's approach will be better for this.</div><div><br></div><div>Of course, the elephant in the room issue here is that sometimes my download fails even though the file is not missing or incomplete. I am looking for a way to download grib files from NCEP without missing part of the file (sometimes).</div><div><br></div><div>Barry</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 19, 2016 at 1:56 AM, Griffith Young <span dir="ltr"><<a href="mailto:griffith.young@bom.gov.au" target="_blank">griffith.young@bom.gov.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Hello Barry,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> An alternative, but possibly less cool method, is to call an NCL script from bash (or your preferred shell) for each file.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> The effect is then such that NCL can succeed or fail, but your script continues.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> <wbr> for f in a b c ; do<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> <wbr> ncl f=\"$f\" << EOF<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> <wbr> print("f: " + f)<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> <wbr> EOF<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> <wbr> done<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> I prefer Guido's suggestion, but when it comes to quick and dirty, this is also an option.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Regards,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> Griff.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> <a href="mailto:ncl-talk-bounces@ucar.edu" target="_blank">ncl-talk-bounces@ucar.edu</a> [mailto:<a href="mailto:ncl-talk-bounces@ucar.edu" target="_blank">ncl-talk-bounces@ucar.<wbr>edu</a>]
<b>On Behalf Of </b>Guido Cioni<br>
<b>Sent:</b> Sunday, 18 December 2016 4:05 AM<br>
<b>To:</b> Barry Lynn<br>
<b>Cc:</b> ncl-talk<br>
<b>Subject:</b> Re: [ncl-talk] Skipping Missing Files<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Hey Barry, <u></u><u></u></p>
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<p class="MsoNormal">An easy way of doing it would be to encapsulate all the file operations into an IF statement which uses either the isfilevar (<a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/isfilevar.shtml" target="_blank">http://www.ncl.ucar.edu/<wbr>Document/Functions/Built-in/<wbr>isfilevar.shtml</a>)
function or the isfilepresent (<a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/isfilepresent.shtml" target="_blank">http://www.ncl.ucar.edu/<wbr>Document/Functions/Built-in/<wbr>isfilepresent.shtml</a>) function to check the existence of either variable in a file or the
file itself. You just have to put an OR so that the operations are skipped, but the script is not interrupted, if either the variable or the file are not found. <u></u><u></u></p>
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<p class="MsoNormal">Cheers <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Il 17 dic 2016 5:29 PM, "Barry Lynn" <<a href="mailto:barry.h.lynn@gmail.com" target="_blank">barry.h.lynn@gmail.com</a>> ha scritto:<u></u><u></u></p>
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<p class="MsoNormal">Hi:<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">I am downloading a lot of data and processing it, file by file.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">It happens that sometimes a file is missing, or a even a variable within the file is missing.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">How can I tell NCL to skip the read, instead of a returning an error and ending the program. <u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Basically, I want NCL to note errors, and bypass them, instead of terminating.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Barry<br clear="all">
<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">-- <u></u><u></u></p>
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<p class="MsoNormal">Barry H. Lynn, Ph.D<u></u><u></u></p>
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<p class="MsoNormal">Senior Lecturer,<u></u><u></u></p>
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<div>
<p class="MsoNormal"><span style="color:#888888">The Institute of the Earth Science, <br>
The Hebrew University of Jerusalem, <br>
Givat Ram, Jerusalem 91904, Israel </span><u></u><u></u></p>
</div>
<p class="MsoNormal"><span style="color:#888888">Tel: 972 547 231 170<br>
Fax: (972)-25662581</span><u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">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>
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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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