<div dir="ltr"><div><div><div>??? There is no Example 7<br></div><br><a href="http://www.ncl.ucar.edu/Applications/eof.shtml">http://www.ncl.ucar.edu/Applications/eof.shtml</a><br><br></div><div>re: "I am not 100% sure what the third option (80.) means in this case"<br><br></div><div>I am not sure either!<br></div><div><br>===<br></div>That said, the last argument is prototypes as 'logical<br><br><pre>function eofunc (
data : numeric,
neval : integer,
optEOF : logical <======
)
</pre>If the function is invoked as:<br> $ evec= eofunc(ptw,neval,80.)<br><br></div>You should have received the following message <br><div><div><div><br>warning:Argument 2 of the current function or procedure was coerced to the appropriate type and thus will not change if the function or procedure modifies its value<br><br></div><div>The correct usage is:<br></div><div><pre>optEOF = True
optEOF@pcrit = 80<br>evec= eofunc(ptw,neval,optEOF)<br><br></pre>==============================<br><br></div><div>Deep Background: NCL actually coerces (converts) the '80.' to a True. However, since there are no optional arguments associated with this coerced argument, it would operate as if the 'optEOF-False'<br><br><br></div></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 20, 2017 at 7:52 AM, Yohei Takano <span dir="ltr"><<a href="mailto:yohei.takano@mpimet.mpg.de" target="_blank">yohei.takano@mpimet.mpg.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear NCL users,<br>
<br>
I have a question on "eofunc".<br>
The NCL website tells me that eofunc has three input (options)<br>
<br>
function eofunc(<br>
data : numeric,<br>
neval : integer,<br>
optEOF : logical<br>
)<br>
<br>
and I understand that you can set options in "optEOF (logical)" such as<br>
using correlation matrix and setting the % of non-missing points.<br>
<br>
However, I found a couple of examples using "eofunc" like below,<br>
<br>
$ evec= eofunc(ptw,neval,80.)<br>
(Example 7 on the NCL website)<br>
<br>
and I am not 100% sure what the third option (80.) means in this case.<br>
I thought the third option supposed to be logical but apparently some<br>
of the example contains a number. I thought this is the same as setting<br>
the % of non-missing points because when I compared the two methods<br>
(i.e. one with setting the optEOF and the other just setting values like<br>
in Example 7), I see the same results (EOF) but am I correct on this?<br>
<br>
If anyone can clarify on this that will be great.<br>
Thank you very much in advance.<br>
<br>
Sincerely,<br>
<br>
Yohei Takano<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Yohei Takano Ph.D<br>
Max Planck Institute for Meteorology<br>
Bundesstraße 53, Room 207<br>
20146 Hamburg, Germany<br>
Tel: <a href="tel:%2B49%20%280%2940%2041173%20-%20150" value="+494041173150">+49 (0)40 41173 - 150</a><br>
Email: <a href="mailto:yohei.takano@mpimet.mpg.de">yohei.takano@mpimet.mpg.de</a><br>
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