<p dir="ltr">Did you try it?</p>
<p dir="ltr">I just quickly tested it and if any one variable is _Fillvalue then the return is a fillvalue. </p>
<p dir="ltr">If that's not what you want and it's just addition you want you could build an array from a,b,c and use dim_sum which will ignore fillvalues I believe. </p>
<p dir="ltr">Good luck,<br>
Alan. </p>
<div class="gmail_quote">On 28 Sep 2014 17:20, "Xi Chang" <<a href="mailto:xi.chang01@gmail.com">xi.chang01@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hallo,<div><br></div><div>How does NCL treat the missing value in a simple arithmetic calculation, e.g.;</div><div><b>X= A + B +C</b></div><div>if A is a missing value and B, and C is <b>non</b> missing value, so what's the result of X?</div><div>is it missing value or is it equal to the value of B+C?</div><div><br></div><div>Thanks</div><div><br></div></div>
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