<div dir="ltr"><div><div><div>Some wild guesses:<br><br>Generally, in geophysics, adjacent grid locations are not independent.<br></div><div><br></div><div>Levezey & Chen: 1983: Statistical Field Significance and its Determination by Monte Carlo Methods<br><br><a href="http://dx.doi.org/10.1175/1520-0493%281983%29111%3C0046:SFSAID%3E2.0.CO;2"> http://dx.doi.org/10.1175/1520-0493(1983)111<0046:SFSAID>2.0.CO;2</a><br><br></div><div>Perhaps a bootstrap (Monte Carlo) approach? as advocated in the paper. Perhaps, the following might be helpful.<br><br> <a href="http://www.ncl.ucar.edu/Applications/bootstrap.shtml">http://www.ncl.ucar.edu/Applications/bootstrap.shtml</a><br><br></div><div>-------<br></div><div><br>Perhaps:<br> <br> <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/rtest.shtml">http://www.ncl.ucar.edu/Document/Functions/Built-in/rtest.shtml</a><br><br></div>An issue would be the appropriate value of 'Nr'. Each spatial data set may ve different number of independent values. If so, use the lower number.<br><br></div>----<br><br></div>Look on the WWW /// maybe there is a more knowledgeable answer.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Mar 14, 2017 at 9:17 PM, Sitan Heyl <span dir="ltr"><<a href="mailto:heylsitan@gmail.com" target="_blank">heylsitan@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello NCL users,<div> Does anyone have an idea how to make a significant test for the correlation coefficient calculated from the function "pattern_cor"?</div><div><br></div><div> Thanks in advance!</div><div><br></div><div>Best,</div><div>Yongli</div></div>
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